Booster longevity: Data reveals how long a third shot protects

A resident receives a dose of the Pfizer COVID-19 vaccine at a health center in Jakarta, Indonesia, on Jan.  13. This week, Indonesia started a program to give booster shots to the elderly and people at risk of severe disease.

Now researchers in the UK have the first estimates for how long a third shot of the Pfizer vaccine will last. The findings are mixed.

(Image credit: Dimas Ardian / Bloomberg via Getty Images)

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