BIG news the shot wanes after 2 months.
https://www.nejm.org/doi/full/10.1056/NEJMoa2114228
https://www.nejm.org/doi/full/10.1056/NEJMoa2114228
BIG news the shot wanes after 2 months.
https://www.nejm.org/doi/full/10.1056/NEJMoa2114228
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