Why eight months? What’s behind the timing of the Covid booster shot
Federal health officials are expected Wednesday to present evidence for why people are likely to need Covid-19 boosters eight months after their second doses of a vaccine, according to sources with the Centers for Disease Control and Prevention.
The eight-month time frame is most likely based on findings from both the U.S. and abroad looking at how the vaccines have held up over time — and whether they can stand up to the hypertransmissible delta variant of the coronavirus that has overtaken the country.
Erika Edwards and Elizabeth Chuck August 17, 2021
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