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Scientists question lasting immunity from virus vaccine – The Australian Financial Review
If a vaccine response were to drop off like the antibodies produced by infection appear to, booster shots might be necessary.
It is normal to see some decline in antibody loads after a vaccine, which will still be effective if the body can subsequently produce antibodies more quickly when exposed to the virus again. Importantly, the body does not always respond in the same way to a vaccine, as it does to an infection.
Tal Zaks, chief medical officer at Moderna, said he believed it was entirely plausible that the antibodies fade, but that it might be because those patients were asymptomatic or started with lower levels…
