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Swine Flu screening only @ 7/8 capability of detection

taksinloong

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There are 8 days within the infection cycle which virus may transmit to other persons. But the current technology of detection is able to only detect within 7 of these 8 days, that mean at least in 1 of the 8 days the virus may transmit to other persons while it is not detectable by existing technology of detection.

There is no symptom showing on an infected person on the 1 of the 8 days, but transmission is already capable of infecting other persons during the 1st day itself.


The epidemic control bureau chief of Taiwan had frankly asked the public NOT to be OVER CONFIDIDENT with himself.

http://tw.news.yahoo.com/article/url/d/a/090501/4/1iqcf.html


新流感篩檢 1/8機率可能漏檢

中時 更新日期:"2009/05/01 03:09" 江慧真、張翠芬/台北報導

全國海空大防疫也會有八分之一機率的漏洞!身兼防疫總指揮官的衛生署長葉金川昨天坦承,H1N1新型流感不像SARS可百分百篩檢出來,新流感在發病具感染力的八天中,會有一天是篩檢不出的(即檢驗空窗期),「境外阻絕只能先擋住八分之七,還是有漏網之魚,要靠自己警覺配合才能篩檢出。」

疾病管制局局長郭旭崧則表示,根據中研院的研究分析,一旦發生新流感大流行,如果做好機場檢疫,可將整個流行延後廿二天,因為,此次的新流感在發病前一天以及發病後七天都具有傳染力,在病患出現症狀的前一天,就具有傳染力,漏檢機會達八分之一,但落實邊境檢疫,可爭取更多時間,做好防疫準備工作。

八天內具傳染力 有一天空窗期

為澄清「豬肉會感染H1N1新型流感」的錯誤傳聞,葉金川也語出驚人地說,新流感病毒已變成人傳人病毒,與原來豬流感是兩回事,和豬肉更沒有關係;台灣有一大堆豬,要是真有一個病人進來,「台灣的豬誰還吃呀!豬是無辜及最倒楣的!」所以那些禁止北美或墨西哥豬肉進口的十三國(如中國、俄羅斯等),「他們衛生署長真的很外行!」

葉金川指出,新型流感和SARS不同,除了傳染力更高之外,也不像SARS可以百分之百篩檢出來;在發病有感染力的八天流程中,有一天是篩檢不出來的,所以現行篩檢會有遺漏。因此防疫不能全靠境外阻絕,登機檢查只能讓流行高峰延緩廿二天,「但也無法完全堵住,還是要呼籲民眾,若有到過疫區、或有症狀要及早就醫,找出剩下的八分之一。」

葉:大家不要對我那麼有信心

他強調,政府防疫的措施有四大策略,包括及早偵測、阻絕傳染、抗病毒藥物以及流感疫苗,但整體來說,「防疫不能只靠我,大家不要對我那麼有信心,像國家衛生研究院研究員蘇益仁及前衛生署長陳建仁都很厲害!」

葉金川表示,新型流感變化很快,周一還在第三級,一周內轉變成第四級、第五級,表示疫情從區域性的人傳人,擴大到幾個國家的傳播,新流感大流行可能性相當高,台灣必須全力備戰。

葉金川強調,四級變五級是國際疫情,這是全球性的颱風,但台灣目前仍維持A1即國外有病例、國內尚無病例的級別,表示這個颱風還沒吹到國內。只要民眾、社區、醫療體系能做好通報防疫工作,即使未來無法避免有個案從境外移入,國內還是可以快速控制疫情。

而依疾管局統計,這幾天來民眾詢問電話倍增,從四月廿五日的五十四通諮詢電話,到了廿八日已有五六六通,廿九日出現新流感疑問的民眾更多,已達一○七一通。在重點航班登機檢疫方面,疾管局統計,目前已經沒有發現任何可疑病例。
 
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taksinloong

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Vaccine STILL LONG WAY! Sept 2009 or later

http://news.yahoo.com/s/ap/20090501...zZWMDeW5fdG9wX3N0b3J5BHNsawNhcG1leGljb2hlYWw-


AP: Mexico health chief optimistic; more US cases
AP

By PAUL HAVEN and NIKO PRICE, Associated Press Writers Paul Haven And Niko Price, Associated Press Writers – 1 hr 58 mins ago

MEXICO CITY – Mexico's top medical officer voiced optimism Thursday that swine flu has slowed in the nation hardest hit by the virus, but the World Health Organization cautioned there is no evidence the worst of the global outbreak is over.

The U.S. caseload rose slightly to 130 as hundreds of schools nationwide shut their doors, and the crisis even reached the White House, which said an aide to the secretary of energy apparently got sick helping arrange a presidential trip to Mexico.

European health ministers vowed to work quickly with drugmakers to rush a vaccine into production, but American health officials suggested inoculations could not begin until fall at the earliest.

Mexican Health Secretary Jose Angel Cordova told The Associated Press new cases have leveled off and the death rate has been nearly flat for several days. He said the next few days would be critical in determining whether the virus was truly on the decline.

"The fact that we have a stabilization in the daily numbers, even a drop, makes us optimistic," he said. "Because what we'd expect is geometric or exponential growth. And that hasn't been the situation. So we think we're on the right track."

The health ministry, which earlier said 168 people were believed killed by swine flu in Mexico, on Thursday would only confirm 12 of those deaths and would not say how many were suspected.

The World Health Organization's top flu official, responding to similarly hopeful remarks from other Mexican officials, sounded a more cautious note about whether the virus had peaked.

"For things to go up and down in a country is expected. If it didn't do that would be very unusual," Dr. Keiji Fukuda said in Geneva. "Hopefully we'll see more of the data of what's going on there. But I expect even in Mexico you will see a mixed picture."

Mexico's top epidemiologist said the WHO was slow to react to an outbreak of atypical pneumonia that grew into the swine flu epidemic, telling AP he wants a probe to find out what happened in order to prevent a repeat.

Dr. Miguel Angel Lezana, director of the National Epidemiology Center, said it notified the Pan American Health Organization on April 16 about the outbreak in Mexico, but didn't see any action by the WHO, the parent organization, until eight days later.

Asked if he would want an internal or independent investigation of PAHO and the WHO's actions, Lezana said: "It is a decision they should take."

Mexico has imposed what amounts to a five-day shutdown of the country, beginning Friday, in hopes of slowing the virus. All but the most essential government services will be suspended, most businesses have been urged to close, and Mexicans have been encouraged to stay in their homes.

On Wednesday, the WHO said swine flu threatened to become a pandemic, and for the first time it raised its threat level to Phase 5, the second-highest. Fukuda said Thursday there were no immediate signs that warranted declaring a Phase 6 pandemic.

Phase 5 means a virus has spread into at least two countries and is causing large outbreaks. Phase 6 means outbreaks have been detected in two or more regions of the world and a pandemic is under way.

The only confirmed U.S. swine flu death so far is a Mexican toddler who succumbed earlier this week in Texas. New cases of swine flu were confirmed Thursday in Europe, but no deaths have been reported outside North America.

In the United States, Vice President Joe Biden stirred concern by saying in an NBC interview that he would discourage family members from flying or even taking the subway because of the swine flu threat.

The White House insisted Biden meant to say he was discouraging nonessential travel to Mexico, and Transportation Secretary Ray LaHood was compelled to state flatly: "It is safe to fly. There is no reason to cancel flights."

The U.S. government has urged Americans to wash their hands and to stay home from work and avoid traveling if they feel ill.

An aide to Energy Secretary Steven Chu apparently got sick helping arrange President Barack Obama's recent trip to Mexico. The aide did not fly on Air Force One and never posed a risk to the president, the White House said.

The U.S. is taking extraordinary precautions, including shipping millions of doses of anti-flu drugs to states. Scientists cannot predict what a new virus might do, and the outbreak could always resurge later.

Scientists are racing to prepare the key ingredient to make a vaccine against the strain, but it will take several months before human testing can begin. Production would not start until fall.

"I don't want anybody to have false expectations," Health and Human Services Assistant Secretary Craig Vanderwagen said. "The science is challenging here." He said 600 million doses in six months was "achievable" based on a fall start.

In hopes of avoiding confusion, the WHO announced it will stop using the term "swine flu," opting for the bug's scientific name, H1N1 influenza A. Obama administration officials have also pointedly referred to the virus as H1N1 in recent days.

Switzerland and the Netherlands became the latest countries to report infections. Canada, New Zealand, Britain, Germany, Spain, Israel and Austria also have confirmed cases.

In the United States, where cases have been confirmed coast to coast, nearly 300 schools were closed Thursday, including at least 200 in Texas.

The Red Cross said it was readying an army of 60 million volunteers who can be deployed around the world to help slow the virus' spread.

Already, the looming shutdown was being felt in Mexico City. Traffic cleared in the notoriously clogged avenues, and the attorney general's office said even crime was down one-third compared with last week. Mexico City's infamous smog dropped to levels normally seen only on holidays.

Mexican President Felipe Calderon said authorities would use the five-day partial shutdown in Mexico to consider whether to extend emergency measures or ease some restrictions. The dates include a weekend and two holidays, Labor Day and Cinco de Mayo, minimizing the disruption.

Cordova told the AP that the extraordinary measures undertaken in Mexico were starting to work. Most of the Mexicans hospitalized with confirmed cases of swine flu have already been released, and he expects the suspected death toll to drop as health officials do further tests.

"Without a doubt, once we study all the cases we're going to see some where there is no evidence or justification for linking them to this virus," he said.

"I think, given the evolution this is having, given the full recovery we are seeing with treatment, there is reason to be calmer, there's reason to think that this can be solved quickly and well," he said. "We simply have a new virus with what is fortunately a low mortality rate ... so I think this problem will be resolved favorably."

Swine flu is a mix of pig, bird and human genes to which people have limited natural immunity. It has symptoms nearly identical to regular flu — fever, cough and sore throat — and spreads similarly, through tiny particles in the air, when people cough or sneeze. About 36,000 people die each year of flu in the United States.

___

AP writers contributing to this report included Frank Jordans in Geneva; Lauran Neergaard in Washington; Alexandra Olson, Morgan Lee and E. Eduardo Castillo in Mexico City; Mike Corder in The Hague, Netherlands; and Balz Bruppacher in Bern, Switzerland.
 

jw5

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Re: Vaccine STILL LONG WAY! Sept 2009 or later

Do they even know how the virus survives and how it is transmitted?
For example, how long can the virus survive on an open surface? Or can it only be transmitted directly from a body to another body?
 
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