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Booster longevity: Data reveals how long a third shot protects

"Specifically, the researchers found that right after the third shot of
the Pfizer vaccine, protection against a symptomatic infection is pretty
good. Two weeks after the shot, the booster cuts the risk by about 70%.

But that protection falls quickly. By three months, the booster reduces
the risk of a symptomatic infection only by about 50%.

But the study from the U.K. found that the booster offers more robust protection against severe disease than against infection. Specifically,
the researchers found that after a third shot of Pfizer, protection
against hospitalizations starts out above 95% (two weeks after the shot)
and remains around 80% even after four months."

Read more here:

https://www.npr.org/sections/goatsandsoda/2022/01/19/1071809356/covid-booster-omicron-efficacy

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