The problem with vaccine waning 4-6 months later was 1st recognized in Israel in July, confirmed by more than 10 reports, and occurs with all vaccines. Protection is fully restored (or even exceeded) by 3rd (booster) shots. 
The >95% vaccine efficacy vs hospitalizations and deaths for mRNA vaccines in the Phase 3 randomized trials also waned. Protection is fully restored to this high level by 3rd (booster) shots.
How long will it last?
Nobody knows for sure yet.
But let's hope Israel is right again:
"By analyzing the antibody levels, researchers have concluded that the third shot could be effective for 9 – 10 months, or even longer."
timesofisrael.com/pfizer-booster…
Nobody knows for sure yet.
But let's hope Israel is right again:
"By analyzing the antibody levels, researchers have concluded that the third shot could be effective for 9 – 10 months, or even longer."
timesofisrael.com/pfizer-booster…
The 3rd shot (boosters) provide ~95% protection vs symptomatic Delta infections. If a person doesn't get infected, they can't transmit. Period.
This is more good news for this week on 3rd shots
nytimes.com/2021/11/16/us/… by @noahweiland and @SharonLNYT
nytimes.com/2021/11/16/us/… by @noahweiland and @SharonLNYT
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