Israel will roll out a booster dose of the Pfizer-BioNTech COVID-19 vaccine to older people, citing a drop in protection against severe disease driven by the Delta variant
In particular, one Israeli scientist said the country has data showing the vaccine's protection against severe illness among this 60-plus age group dropped from 97% in April to 81% in July. Those results have yet to be published in a peer-reviewed medical journal or even posted on a preprint server. that these results, if they hold up, would be"the first sign of a significant dropdown of protection against hospitalizations and death for these vaccines.
. One difference between the two findings is that Israel's results are specific to the elderly population.that boosters will be needed six to 12 months after the initial vaccination. Laboratory testing done by Pfizer showed neutralizing antibodies, a key part of the immune response, significantly declined eight months after the second dose among all age groups. from its clinical trial that enrolled more than 40,000 volunteers.
The vaccine's overall efficacy against severe disease in that study was 97%, with 30 cases occurring among people who got placebo shots and 1 case in a person who got the vaccine. Pfizer's findings have also yet to be published in a peer-reviewed medical journal, and the company said it would submit an application to US regulators in August to begin offering booster shots.Sign up for notifications from Insider! Stay up to date with what you want to know.
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