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[Breaking] Covid19 vaccine developed by Pfizer more than 90% effective

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HEALTH AND SCIENCE
Pfizer, BioNTech say Covid vaccine is more than 90% effective—‘great day for science and humanity’
PUBLISHED MON, NOV 9 20206:45 AM ESTUPDATED 12 MIN AGO

Sam Meredith@SMEREDITH19




KEY POINTS
  • Dr. Albert Bourla, chairman and CEO of Pfizer, hailed the trial results as a “great day for science and humanity.”
  • Pfizer and BioNTech said the case split between vaccinated individuals and those who received a placebo indicated a vaccine efficacy rate of above 90% at seven days after the second dose.
  • It means that protection from Covid-19 is achieved 28 days after the initial vaccination, which consists of a two-dose schedule.

Pfizer and BioNTech announced Monday their coronavirus vaccine was more than 90% effective in preventing Covid-19 among those without evidence of prior infection, hailing the development as “a great day for science and humanity.”

“I think we can see light at the end of the tunnel,” Pfizer Chairman and CEO Dr. Albert Bourla told CNBC’s Meg Tirell on “Squawk Box.” “I believe this is likely the most significant medical advance in the last 100 years, if you count the impact this will have in public health, global economy.”

The announcement comes as drugmakers and research centers scramble to deliver a safe and effective vaccine to help bring an end to the coronavirus pandemic that has claimed over 1.2 million lives worldwide.

Scientists are hoping for a coronavirus vaccine that is at least 75% effective, while White House coronavirus advisor Dr. Anthony Fauci has said one that is 50% or 60% effective would be acceptable.

U.S. stock futures skyrocketed as investors cheered the news. Futures on the Dow Jones Industrial Average surged 1,646 points, implying an opening gain of more than 1,630 points.

Airline and cruise company stocks jumped in premarket trading — with some stocks rising by 20% and 30%. Both industries have been significantly affected by the global health crisis as travel restrictions and a resurgence in outbreaks that continue to hurt demand.
Pfizer’s results were based on the first interim efficacy analysis conducted by an external and independent Data Monitoring Committee from the phase three clinical study. The independent group of experts oversees U.S. clinical trials to ensure the safety of participants.

The analysis evaluated 94 confirmed Covid-19 infections among the trial’s 43,538 participants. Pfizer and the U.S. pharmaceutical giant’s German biotech partner said the case split between vaccinated individuals and those who received a placebo indicated a vaccine efficacy rate of above 90% at seven days after the second dose.

It means that protection from Covid-19 is achieved 28 days after the initial vaccination, which consists of a two-dose schedule. The final vaccine efficacy percentage may vary, however, as safety and additional data continue to be collected.

Dr. Scott Gottlieb, a former FDA commissioner, told CNBC the vaccine could be available in limited use as early as late December and widely available by the third quarter of 2021.
A health care worker holds an injection syringe of the phase 3 vaccine trial, developed against the novel coronavirus (COVID-19) pandemic by the U.S. Pfizer and German BioNTech company, at the Ankara University Ibni Sina Hospital in Ankara, Turkey on Octo

A health care worker holds an injection syringe of the phase 3 vaccine trial, developed against the novel coronavirus (COVID-19) pandemic by the U.S. Pfizer and German BioNTech company, at the Ankara University Ibni Sina Hospital in Ankara, Turkey on October 27, 2020.
Dogukan Keskinkilic | Anadolu Agency | Getty Images

“The first set of results from our Phase 3 COVID-19 vaccine trial provides the initial evidence of our vaccine’s ability to prevent COVID-19,” Bourla said in a statement.
“We are reaching this critical milestone in our vaccine development program at a time when the world needs it most with infection rates setting new records, hospitals nearing over-capacity and economies struggling to reopen,” Bourla continued.

“With today’s news, we are a significant step closer to providing people around the world with a much-needed breakthrough to help bring an end to this global health crisis. We look forward to sharing additional efficacy and safety data generated from thousands of participants in the coming weeks.”

Distribution challenges
Roughly 42% of the trial’s global participants had racially and ethnically diverse backgrounds, Pfizer and BioNTech said, adding that there haven’t been any serious safety concerns reported yet.
The companies said they planned to submit for emergency use authorization to the U.S. Food and Drug Administration soon after they have two months of data, which is currently on track for the third week of November.

Based on current projections, Pfizer and BioNTech expect to produce up to 50 million vaccine doses in 2020, and up to 1.3 billion doses in 2021. The vaccine requires two doses per person. In July, the companies reached a nearly $2 billion agreement with the U.S. government to supply 100 million doses.

Plans to deliver hundreds of millions of coronavirus vaccines around the world raises questions about logistics and distribution in part because of the need to store and transport them in supercooled containers.
Pfizer’s vaccine requires a storage temperature of minus 94 degrees Fahrenheit. By comparison, Moderna has said its vaccine must be stored at minus 4 degrees Fahrenheit.

The company reportedly plans to load these suitcase-sized boxes from distribution sites in Kalamzoo, Michigan, and Puurs, Belgium, onto as many as two dozen trucks per day, allowing for the daily transit of roughly 7.6 million doses to nearby airports.

The companies said they plan to submit data from the full phase three trial, which began on July 27, for scientific peer-review publication.

‘Let’s take a deep breath’
“The U.S. FDA set a threshold of 50% effectiveness for a Covid-19 vaccine to merit approval. A 90% effective vaccine would be extraordinary,” Dr. Peter Drobac, a global health physician and director of the Skoll Centre for Social Entrepreneurship at the University of Oxford, said via email.

“We’ll need to see the full results subjected to independent review. Let’s take a deep breath, but this is very promising news,” he added.

U.S. officials and scientists are hopeful a vaccine to prevent Covid-19 will be ready in the first half of 2021 — 12 to 18 months since Chinese scientists first identified the coronavirus and mapped its genetic sequence.

It’s a record-breaking time frame for a process that normally takes about a decade for an effective and safe vaccine. The fastest-ever vaccine development, mumps, took more than four years and was licensed in 1967.

A more than 90% effective coronavirus vaccine would be roughly on par with one dose of a measles vaccination, which is about 93% effective, according to the Centers for Disease Control and Prevention.

Comparatively, the CDC says a vaccine for influenza reduces the risk of flu illness by between 40% to 60% among the overall population.
— CNBC’s Berkeley Lovelace Jr. contributed to this report.
 

mudhatter

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biontech founded by Muslim turk

slanties nowhere in sight

why leh?

why pig trotter sucking slanty tiger penis eaters got no brains?
 

eatshitndie

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tiagong moderna more effective at 96.9%. phase 3 trial results cumming.
huat ah! initial data shows 94.5% effective. may trend higher to 96.9% with more data streaming in. i'm holding my moderna stock as fauci says moderna's mrna version can be distributed and stored like typical flu vaccines in normal refrigerators, without the need for special cryonic refrigerators that are required for pfizer's vaccine. and he says moderna's solution will be the de facto vaccine to be adopted by majority of hospitals and vaccination centers as it will be more readily available. expect pfizer to do a hostile takeover of moderna.
 

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How do the Moderna and Pfizer coronavirus vaccines compare?
HHS Sec. Azar on Moderna, Pfizer vaccine effectiveness
HHS Sec. Azar on Moderna, Pfizer vaccine effectiveness
Moderna says its coronavirus vaccine is 94.5% effective; reaction from Health & Human Services Sec. Alex Azar.

Amid breaking reports Monday morning that Moderna’s coronavirus vaccine candidate reached 94.5% efficacy rate, according to a company announcement, many are comparing the vaccine to Pfizer’s candidate — announced just last Monday as having 90% effectiveness.

Some experts, including Dr. Anthony Fauci, have embraced the idea of multiple coronavirus vaccines in order to meet global demand--if the vaccines are approved, that is--and to help put an end to the ongoing health crisis that has resulted in at least 54.5 million infections globally and over 1.3 million deaths worldwide, says data from Johns Hopkins University.

Both Moderna and Pfizer's vaccine candidates involve two doses of the injection to the arm. (iStock)
Both Moderna and Pfizer's vaccine candidates involve two doses of the injection to the arm. (iStock)

At the moment, both Pfizer and Moderna are gathering the two months' worth of safety data needed for emergency approval from the Food and Drug Administration, aside from additional assessment by other independent advisory groups, like VRBPAC. Pfizer previously said it expects this safety data in the third week of November, while Moderna expects to file for FDA approval in a few weeks. Nevertheless, both vaccine candidates involve two doses of the injection to the arm several weeks apart--21 days apart for Pfizer, 28 days for Moderna.

“It’s like a typical vaccine, you clean your arm with a bit of product to make sure you don’t get contaminated, you inject the vaccine and you put a Band-Aid and that’s it,” Stephane Bancel, Moderna CEO, told Fox Business’ Maria Bartiromo in an interview Monday. Bancel compared the vaccine to a flu shot.

After Pfizer surfaced with positive early findings on its coronavirus vaccine candidate last week, experts were hopeful another effective vaccine would follow given similar gene technology, or the so-called messenger RNA (mRNA) platform. The new technology, which is being used by Pfizer and Moderna, injects the genes for these "spike proteins" into healthy cells to induce an immune response.

So while the two vaccines share similar technology, they do differ in terms of “user friendliness,” in terms of temperatures needed for storage.

Bancel told Fox Business that the company newly learned its vaccine candidate has six months of shelf life in a regular freezer, at minus 20 degrees Celsius, and up to 30 days in a refrigerator.

“Those freezers are widely available at pharmaceutical distribution centers because there are FDA-approved products [that] require minus 20 [degrees Celsius for] storage, so that’s not a problem,” Bancel said.

“For a month, you can take the product out of the freezer, and then you put it in a regular fridge, like you store insulin,” Bancel added, suggesting major gains for usability.

Meanwhile, Pfizer’s vaccine must be stored at temperatures of minus 70 degrees Celsius or below. In countries with intense heat and in regions with spotty electricity, these requirements will prove problematic.

“The logistics of distributing the Pfizer vaccine, if proven to be safe and effective, will no doubt be a Herculean task,” Andrew Peterson, assistant professor of philosophy at George Mason University, previously told Fox News. “Beyond the challenge of physically transporting the vaccine by air and land to distribution centers across America and internationally, there are the additional obstacles of keeping the vaccine at sub-zero temperatures and monitoring deliveries for theft.”

Bancel said Moderna expects to have 20 million doses ready by the end of the year, and Alex Azar, secretary of the Department of Health and Human Services (HHS), recently told reporters that distribution for Pfizer's vaccine will potentially begin in late November in increments of about 20 million doses per month.

Fox News’ Alexandria Hein contributed to this report.

Kayla Rivas is a Health reporter and joined Fox News in April 2020.
 

tobelightlight

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People, pls wake up. This cute harmless virus can be killed using 3% hydrogen preoxide and humified the air and you breath in. That's it.
These dark evil keep pushing vaccine with their media promoting it. pls.. we, the awakened ones, do not inject toxin into our body, especially covid vaccine.
 

gingerlyn

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I am waiting for Tiongcock and Sohlian to release their vaccine data. Hopefully their data show 101% effectiveness, just like our sinkie 北京101生发剂
 

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Pfizer's COVID-19 doses need storage colder than Mars
Pharmaceutical company Pfizer announced positive early results on its Covid-19 vaccine trial, which has proven to be 90 per cent effective in preventing infection of the virus.
Pharmaceutical company Pfizer announced positive early results on its Covid-19 vaccine trial, which has proven to be 90 per cent effective in preventing infection of the virus. (Getty)
Requiring storage at -70C presents a huge challenge.

Many hospitals don't have storage facilities capable of dropping temperatures colder than those found on the planet Mars (average daily temperatures of -62C)

Such freezers were "like unicorns", a US-based healthcare consultant Soumi Saha said.

"They are very hard to find," Ms Saha, whose company Premier Inc consults to pharmacies, told US news broadcaster ABC.

"(It's) the coldest that any vaccine or any drug has ever been required to be stored at."

DNL branded dry ice slabs are seen at the Dry Ice Nationwide manufacturing facility in Reading, England. Producing dry ice in a number of forms, the company provides both coarse pellets and slabs for use in temperature-controlled pharmaceutical logistics, pathological environments and chemical laboratories. (Getty)
The GPS systems built into the containers will help Pfizer monitor temperatures and also ward off criminals who could be hoping to steal vaccines.

Australia has paid Pfizer for 10 million doses, if its vaccine turns out to be successful. The pharma giant will send 200 million to the EU, 100 million doses to the US and 40 million to the UK.

Earlier this month Pfizer reported it had achieved a 90 per cent effectiveness rate during late-stage clinical trials.

It is now moving into stage 3 trials and will give the vaccine to some of a sample group numbering 44,000 people.

Some of those people will be given the vaccine, others a placebo.

Pfizer will then monitor what happens when the group goes out into the world.

When participants show symptoms of COVID-19, scientists will check if they were given a vaccine or a placebo.

That data will allow Pfizer to understand whether its vaccine works, and at what level.

It is possible Pfizer will have enough safety data to apply for emergency approval from US government agency, the Food and Drug Administration, next week.

The covid-19 vaccine developed by Pfizer and BioNTech must be kept at ultra-cold temperatures in its journey from the production line to a patient's arm. To address this challenge, Pfizer developed a suitcase-sized box that uses dry ice to keep between 1,000 and 5,000 doses for 10 days at minus 70 degrees Celsius. (Getty)
However, there is an impact of expediting the approval process.

There will be no data to show how long an approved vaccine will offer protection.

And scientists will have no real information over any potential long-term side effects.

Yesterday a second experimental COVID-19 vaccine — from Moderna Inc — yielded extraordinarily strong early results.

Moderna said its vaccine appears to be 94.5 per cent effective, according to preliminary data from an ongoing study.

The phase 3 stage of the Moderna trial will involve 30,000 participants.

Both the Pfizer and Moderna vaccines require two shots, given several weeks apart.

Moderna's vaccine does not appear to be as temperature-sensitive as its competitor, Pfizer.

The Moderna vaccine starts off frozen, but the company said it can be thawed and kept in a regular refrigerator for 30 days.

With Associated Press

Contact: [email protected]
 

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Sinovac's COVID-19 vaccine induces quick immune response: Study
A display shows packages of vaccine candidate for SARS-CoV-2 by Sinovac Biotec
A display shows packages of vaccine candidate for SARS-CoV-2 by Sinovac Biotech during a government-organised media tour showcasing the company's development of a coronavirus disease (COVID-19) vaccine candidate in Beijing, China, Sep 24, 2020. (Photo: REUTERS/Thomas Peter)
18 Nov 2020 08:00AM
(Updated: 18 Nov 2020 08:15AM)
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BEIJING: Sinovac Biotech's experimental COVID-19 vaccine CoronaVac triggered a quick immune response but the level of antibodies produced was lower than in people who had recovered from the disease, preliminary trial results showed on Wednesday (Nov 18).

While the early to mid-stage trials were not designed to assess the efficacy of CoronaVac, researchers said it could provide sufficient protection, based on their experience with other vaccines and data from preclinical studies with macaques.

The study comes hot on the heels of upbeat news this month from US drugmakers Pfizer and Moderna as well as Russia that showed their experimental vaccines were more than 90 per cent effective based on interim data from large, late-stage trials.

READ: Moderna says its vaccine is 94.5% effective in preventing COVID-19
CoronaVac and four other experimental vaccines developed in China are currently undergoing late-stage trials to determine their effectiveness in preventing COVID-19.

The Sinovac findings, published in a peer-reviewed paper in medical journal The Lancet Infectious Diseases, came from results in Phase 1 and Phase 2 clinical trials in China involving more than 700 participants.

"Our findings show that CoronaVac is capable of inducing a quick antibody response within four weeks of immunisation by giving two doses of the vaccine at a 14-day interval," Zhu Fengcai, one of the authors of the paper, said.

"We believe that this makes the vaccine suitable for emergency use during the pandemic," Zhu said in a statement published alongside the paper.

A man works in the packaging facility of Chinese vaccine maker Sinovac Biotech
A man works in the packaging facility of Chinese vaccine maker Sinovac Biotech, developing an experimental coronavirus disease (COVID-19) vaccine, during a government-organized media tour in Beijing, China, Sep 24, 2020. (Photo: REUTERS/Thomas Peter)
Researchers said the findings from large, late-stage studies, or Phase 3 trials, would be crucial to determine if the immune response generated by CoronaVac was sufficient to protect people from the coronavirus infection.

Sinovac is currently running three Phase 3 trials in Indonesia, Brazil and Turkey.

Naor Bar-Zeev from Johns Hopkins University, who was not involved in the study, said the results must be interpreted with caution until Phase 3 results are published.

"But even then, after Phase 3 trial completion and after licensure, we should prudently remain cautious," he said.

'ATTRACTIVE OPTION'

CoronaVac is one of three experimental COVID-19 vaccines China has been using to inoculate hundreds of thousands of people under an emergency use programme.

The two other vaccines in China's emergency programme, both developed by institutes linked to Sinopharm, and another vaccine from CanSino Biologics, were also shown to be safe and triggered immune responses in early and mid-stage trials, according to peer-reviewed papers.

Gang Zeng, a Sinovac researcher involved in the CoronaVac study, said the vaccine could be an attractive option because it can be stored at normal fridge temperatures of 2 to 8 degrees Celsius and may remain stable for up to three years.

"(It) would offer some advantages for distribution to regions where access to refrigeration is challenging," the author said.

By contrast, vaccines developed by Pfizer/BioNTech and Moderna use a new technology called synthetic messenger RNA (mRNA) to activate the immune system against the virus and require far colder storage.

Pfizer's vaccine must be stored and transported at -70 degrees Celsius though it can be kept in a normal fridge for up to five days, or up to 15 days in a thermal shipping box. Moderna's candidate is expected to be stable at normal fridge temperatures for 30 days but for storage of up to six months it needs to be kept at -20 degrees Celsius.

READ: Pfizer to start pilot delivery programme for its COVID-19 vaccine in 4 US states
CoronaVac is also being considered by Brazil and Indonesia for inoculations in the coming months.

Indonesia has sought emergency authorisation to start a mass vaccination campaign by the end of the year and vaccines produced by Sinovac and China's Sinopharm are slated to be used in the early stages of the campaign.

Brazil's Sao Paulo also plans to roll out CoronaVac as early as January and has agreed on a supply deal with Sinovac.
 

Hypocrite-The

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Pfizer 'very close' to applying for US emergency approval, says CEO
FILE PHOTO: Vials and medical syringe are seen in front of Pfizer logo in this illustration
FILE PHOTO: Vials with a sticker reading, "COVID-19 / Coronavirus vaccine / Injection only" and a medical syringe are seen in front of a displayed Pfizer logo in this illustration taken October 31, 2020. REUTERS/Dado Ruvic/File Photo
18 Nov 2020 08:01AM
(Updated: 18 Nov 2020 08:10AM)
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WASHINGTON: Pfizer is "very close" to applying for an emergency use approval for its COVID-19 vaccine after collecting safety data to submit to US regulators, the company's CEO said Tuesday (Nov 17), according to a report.

The pharmaceutical giant announced last week preliminary results from a late-stage clinical trial showing the injections it had co-developed with Germany's BioNTech was more than 90 per cent effective after the second dose.

"We are very close to submitting for an emergency use authorisation," Albert Bourla told medical news site Stat. "We will announce it as soon as we are doing it."

READ: Pfizer to start pilot delivery programme for its COVID-19 vaccine in 4 US states
Pfizer has previously said it expects to contact the US Food and Drug Administration to apply for an Emergency Use Authorization by the third week of November, meaning the announcement could be days away.

The FDA had imposed a requirement on COVID-19 vaccine makers of having at least two months of follow-up with volunteers after their second dose, taken 28 days after the first, in order to ensure the drugs are safe.

On Monday, Moderna and the US National Institutes for Health announced similar preliminary results from their own trial, finding their vaccine was almost 95 per cent effective.

Both use mRNA (messenger ribonucleic acid) technology to deliver genetic material to the body that makes human cells create a protein from the virus.

This trains the immune system to be ready to attack if it encounters SARS-CoV-2.

READ: Moderna COVID-19 vaccine results 'stunningly impressive' - Fauci
Other vaccines that are in late-stage trials, such as one being developed by Johnson & Johnson and another by Oxford University and AstraZeneca, use modified viruses to deliver genetic material for the same purpose.

No mRNA vaccines have ever been approved, but Anthony Fauci, the United States' top infectious disease scientist told AFP Tuesday the technology had now "established itself".

Bourla told Stat he was relieved that another vaccine was also successful and hoped many more would enter the fray because the global need was so dire.

READ: Vaccine will not be enough to stop COVID-19 pandemic - WHO chief
Moderna has previously said it expects to apply for an EUA by Nov 25.

After the companies apply, the EUAs could follow in a matter of weeks.

Moncef Slaoui, chief of the US government's Operation Warp Speed for vaccine and treatment development, said he expects approval in the first half of December.

Since companies that have been funded by the government have already been manufacturing their doses ahead of approval, Slaoui says there will be enough between Pfizer and Moderna to immunize 20 million Americans in December.
 

tobelightlight

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Free advertisment for these drug companies on their vaccine.. wow... so am i going to be impressed?

Let me tell you a secret, i didn't even use hand sanitizer at all, except one time in early part of the year when a lady wanna give me something and i stretch out my hand and she squeeze something out from a bottle. i quickly go to toilet to wash it away.

Not using hand sanitizer will protect you from virus. This is what the frug company is doing.
 

Hypocrite-The

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We may have to accept a 'good enough' COVID-19 vaccine, at least in 2021
The Conversation
/
By Paul Komesaroff, Ian Kerridge and Ross Upshur
Posted 9hhours ago
Experts say any prediction on a vaccine timeframe is still an 'educated gamble'.

A COVID-19 vaccine may be ready by March 2021 but it will almost certainly come with limitations. What are we prepared to accept?(AAP: Glenn Hunt)
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Australian Health Minister Greg Hunt said recently the government is on track to deliver COVID-19 vaccines from March 2021.
US biotech firm Moderna has just announced its COVID-19 vaccine has 95 per cent efficacy, following on the heels of Pfizer's claimed 90 per cent efficacy and the Russian Sputnik V vaccine's 92 per cent efficacy, albeit based on limited data and yet to be peer-reviewed.
Inside the coronavirus vaccine

One's slow, one's never worked and the other could 'go rogue' inside you: three options for a coronavirus vaccine to free the world.
Read more

We'll likely see more preliminary results from other vaccine trials reported in the media in coming weeks and months.
While an effective vaccine will provide the best chance of controlling the disease, it is sadly not so simple. No vaccine will be perfect or end the pandemic instantly. The first vaccines are also likely to have significant limitations.
The issue is how good a vaccine is good enough? We also need to think about what imperfections we — as individuals, regulators or governments — will be prepared to accept.
How safe is safe enough?
Safety is obviously the major concern. Vaccines are designed to be given to very large numbers of healthy people. This means even an extremely rare, serious adverse event, when applied to a population of millions, can produce major harm.
How are COVID-19 vaccines almost ready so quickly?
A scientist putting medication into a vial in a laboratory.
Previous vaccines have taken years to develop, so why are some COVID-19 candidates ready so quickly, and will they be safe?
Read more

Short-term trials on small population samples relative to the numbers expected to receive the vaccine may also not be able to pick up relatively rare but important risks. This is a problem we may not be able to avoid because the only way to find out is to give the vaccine to large numbers of people and then allow long periods of time to elapse, for any long-term adverse events to become evident.
Obviously, all therapeutic agents carry the possibility of adverse effects and in individual cases decisions have to be made about whether the potential benefits justify taking the risks. It is arguable that the extreme dangers associated with COVID-19 justify accepting a higher level of risk for the vaccine. However, while the US and Australian regulatory authorities have broad guidelines relating to vaccine safety, neither has issued guidelines regarding the levels of risk that are considered justified for a coronavirus vaccine, and there has been only limited public debate on this subject.
How effective is good enough?
Efficacy — the vaccine's ability to produce clinical and public health benefits — is also uncertain.
Ideally, a vaccine should prevent any person who receives it from catching the disease. However, at least with the first vaccines, it is likely the benefits will be more limited. For example, they may slightly reduce the severity of the illness, or they may only benefit a small subset of the population. No current trials are looking at purely whether the vaccine will reduce the chance of dying from COVID-19 of individuals in specific risk groups.

The logistical challenges to a COVID-19 vaccine rollout
Step one was discovering a vaccine. Step two is to find out how to ship it across the globe
Finding a COVID-19 vaccine that works is the first challenge. Distributing it across the world is another story altogether.
Read more


In fact, different clinical trials have different "efficacy end points", including (among others) effects on susceptibility to infection, severity of disease, time to recovery and mortality, in different age and population groups.
There is no guarantee vaccines under development will provide significant protection for those in most need, such as people in older age groups or those with existing medical conditions. Not all trials are specifically recruiting such participants and there is a real possibility benefits will not extend to them. In other words, a clinical trial might show "efficacy" in a formal sense but might not solve the key problems we are facing in the real world.
Earlier this year, the US Food and Drug Administration said it would only consider approving vaccines that "prevent disease or decrease its severity in at least 50 per cent of people who are vaccinated". Australia's equivalent, the Therapeutic Goods Administration, has not issued any similarly precise guidance.
Catch up on the main COVID-19 news from November 18 with our coronavirus blog.How equitable is good enough?
Access and distribution of any vaccine pose major problems. Some of these are built into the nature of the product itself.
For example, vaccines like the mRNA vaccine developed by Pfizer that need to be transported and stored at around -70℃, will have limited utility in low and middle income countries with limited health infrastructure and in rural and remote communities all over the world — meaning other vaccines may need to be found for these populations.
Australia's chance to avoid COVID-19 vaccine 'disaster'
A woman with a book
The majority of Australians are ready and willing to take a COVID-19 jab. But a survey conducted by the ABC finds others are not as convinced.
Read more

The role of minorities in relation to clinical studies of therapeutic products in the US is very uneven, in terms of participation, exposure to risk and access to benefits. There is a serious chance that in the search for a COVID-19 vaccine those least likely ultimately to receive the final product will be the ones who carry the greatest risk. This creates a possibility the social divisions already exposed by the COVID crisis will be further exacerbated.
Further, while there has been widespread acknowledgement of the need for access and supply of COVID vaccines to poorer nations there is no legal structure to ensure this and no guarantee it will actually happen.
Where to next?
A number of COVID-19 vaccines will likely become available during 2021 that offer either limited protection from infection or lower the risk somewhat of severe disease. However, these benefits may not necessarily be for those most at risk.
Who are the frontrunners in the coronavirus vaccine race?

There are more than 100 coronavirus vaccines in the pipeline and almost a dozen that have made it to humans trials. ABC Health takes a look.
Read more

Robust regulatory systems, and independent scrutiny of clinical trial results, mean COVID-19 vaccines will likely be safe in the short-term. However, no-one will know about long-term risks and distribution may be limited, for logistic, economic and cultural reasons.
Even if we develop a "good enough" vaccine, there are no guarantees. Although many will be prepared to chance the first vaccines, many others will refuse them, despite government attempts at persuasion.
So herd immunity via vaccination, which for the coronavirus requires effective immunisation of at least two-thirds of the population, will remain a long way away.
This means strategies to reduce the spread, such as physical distancing, use of face masks and hand hygiene and, where necessary, rigorous quarantine measures, will be with us for some time.
Paul Komesaroff is Professor of Medicine at Monash University. Ian Kerridge is Professor of Bioethics and Medicine at Sydney Health Ethics, Haematologist/BMT Physician, Royal North Shore Hospital and Director, Praxis Australia, University of Sydney. Ross Upshur is a professor at the Dalla Lana School of Public Health at the University of Toronto. This article first appeared on The Conversation.
 
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