OYK answers your questions.
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1 hr ·
These are some FAQs, following our MTF press conference two days ago.
Why do we need a 9-month expiry date after the 2 doses of mRNA vaccines / 3 doses of Sinovac/Sinopharm vaccines?
Because protection will wane over time. This can be restored with a booster dose, which is recommended 5 months after mRNA vaccines and 3 months after Dose 3 for Sinovac/Sinopharm.
We will allow individuals up to 270 days to get a booster. The policy will take effect from Monday, 14 Feb 2022.
How to calculate my vaccination validity?
Here’s an example:
Say you got your Dose 2 of mRNA vaccine on 1 June 2021
Around 150 days or 5 months later, 1 Nov 2021 – Eligible for booster
270 days or about 9 months later, 26 Feb 2022 – Get boosted by this date to be considered fully vaccinated
Day 271, 27 Feb 2022 – Fully vaccinated status will lapse if booster is not taken
If I have been infected and recovered, what is the recommendation for boosters?
If you have recovered well from an infection, without complications, your immune system would have gone through a strong stimulus. Think of it as a fairly powerful vaccination shot.
There can be various combinations of infection with vaccination doses.
You may be infected after you have completed two doses, before you started vaccination, or in between the two doses.
Say an mRNA vaccine dose is V and infection is I, the three combinations are:
V+V+I: You got three stimulants, and you are considered boosted.
I+V+V : You got three stimulants, and are considered boosted.
V+I+V: You are fully vaccinated, but not boosted. This is because the timing between two doses is 3 to 4 weeks, and to get infected in between, means the first V and the I are too close in timing together, and they are not separate stimulants to your body. You need V+I+V+V to be considered boosted.
Rule of thumb, if you are infected while unvaccinated or partially vaccinated, you need two more doses to be considered boosted.
But there’s no rush to get boosted if you have I+V or V+I+V. Our experts tell us that under these scenarios, the immunity takes longer to wane, beyond 9 months. So you will get the green light for booster VDS until our experts advise that it is time to boost. But if you want the extra protection, it is safe to get the boost, and our Vaccination Centres will allow you to do so.
Now that we must get a third dose to get our vaccination status extended, does that mean there will be a fourth, fifth, sixth dose?
Israel is the only country so far to administer a fourth dose for people who are not immunocompromised.
It is too early to answer that question. If we look at an endemic disease like Influenza, people take annual vaccines to protect themselves. This is because the Influenza virus keeps mutating so a new vaccine dose is necessary every year. So whether we need future COVID-19 vaccine doses, depends on how fast the protection from three doses wanes, and whether the virus keeps mutating.