You asked: Are the promised Covid vaccines once in a lifetime, or do they need to be retaken seasonally? It's not clear yet, @kavitapmd tells Mehdi, but "we hope that they will have long-lasting immunity."
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You asked: How are scientists assessing side effects to a Covid vaccine as it’s rushed through? To answer that, we’re going to need “long-term studies conducted over a period of time,” says @syramadad. “This is information that we're going to find out in the years to come.”

Nov 13, 2020 · 12:50 AM UTC

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Replying to @MehdiHasanShow @syramadad
😳 Uhm...sounds not so safe.
Replying to @MehdiHasanShow @mehdirhasan @syramadad
Who will be responsible for birth defects or other consequences that may result from having to rush the vaccine through?
Replying to @MehdiHasanShow @mehdirhasan @syramadad
If we survive the blue ocean event rapidly unfolding