Getting One Vaccine Is Good. How About Mix-and-Match?
![](https://static01.nyt.com/images/2021/03/30/science/30virus-mixvax-1/merlin_185207331_2c05bb47-7842-41b9-afbb-7d0162d47b40-mediumThreeByTwo440.jpg)
By BY CARL ZIMMER from NYT Health https://ift.tt/31x609J
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Getting One Vaccine Is Good. How About Mix-and-Match?
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