Vaccination offers more protection against Covid-19 than previous infection, a C.D.C. study suggests.
By BY BENJAMIN MUELLER from NYT Health https://ift.tt/3BvNgqy
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Vaccination offers more protection against Covid-19 than previous infection, a C.D.C. study suggests.
![Vaccination offers more protection against Covid-19 than previous infection, a C.D.C. study suggests.]()
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