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@joelle_emerson ("Joelle Emerson") retweeted:

@michaelzlin ("Michael Lin, MD PhD 🧬") wrote:

WHO is convincing me to be more enthusiastic about 4th doses.

Today they reviewed studies showing dose 4 gives ≥60yo a 60% more protection from severe disease over dose 3, or an increase in absolute VE from 82% to 92%.

That's a meaningful improvement.

https://www.who.int/news/item/17-05-2022-interim-statement-on-the-use-of-additional-booster-doses-of-emergency-use-listed-mrna-vaccines-against-covid-19