FDA OKs Another Pfizer, Moderna COVID Booster for 50 and Up
The move comes at a time of great uncertainty. COVID-19 cases have dropped to low levels after the winter surge of the super-contagious omicron variant. Two vaccine doses plus a booster still provide strong protection against severe disease and death, CDC data show.
There's limited evidence to tell how much benefit another booster could offer right now. FDA made the decision without input from its independent panel of experts that has wrestled with how much data is required to expand shots. Surging cases of the Delta variant of COVID-19, along with a noticed decline in immunity a few months after the vaccine, are leading to a call for getting a 3rd dose of the Pfizer and Moderna vaccines. But it's still unclear what will be recommended for people who received the Johnson & Johnson shot. Dr. Aditi Nerurkar from Harvard explains what we know and we don't about the booster shots plans.
U.S. health officials also looked to Israel, which during the omicron surge opened a fourth dose to people 60 and older at least four months after their last shot. Preliminary data posted online last week suggested some benefit: Israeli researchers counted 92 deaths among more than 328,000 people who got the extra shot, compared to 232 deaths among 234,000 people who skipped the fourth dose.
Plus, a longer interval between shots helps the immune system mount a stronger, more cross-reactive defense.
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