powastick
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There is a serious implication for this if the vaccine just last for 6 month. If the vaccine don't last, the epidemic will last longer, and the virus has more bigger chance to mutate. Also, we need to be vaccinate regularly.That’s expected. Vaccination eases efficacy with the time. So every vaccine. a bit shocking though that it sinks to that low.
Yes Moderna has a higher doses of mRNA than Pfizer.