Vaccination offers more protection against Covid-19 than previous infection, a C.D.C. study suggests.
![](https://static01.nyt.com/images/2021/10/29/us/29virus-briefing-vaccine-protection/29virus-briefing-vaccine-protection-mediumThreeByTwo440.jpg)
By BY BENJAMIN MUELLER from NYT Health https://ift.tt/3BvNgqy
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