Biden had received a second booster. Here’s why it wasn’t enough to prevent infection.
![](https://static01.nyt.com/images/2022/07/21/multimedia/21virus-briefing-boosters/21virus-briefing-boosters-mediumThreeByTwo440.jpg)
By BY APOORVA MANDAVILLI from NYT Health https://ift.tt/4fAwURp
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Biden had received a second booster. Here’s why it wasn’t enough to prevent infection.
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