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USA TODAY
Compartió un vínculo
2021-04-20 16:31:03
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https://www.usatoday.com/story/news/health/2021/04/19/herd-immunity-us-likely-impossible-but-vaccines-can-control-covid/7139419002/
https://www.usatoday.com/story/news/health/2021/04/19/herd-immunity-us-likely-impossible-but-vaccines-can-control-covid/7139419002/
WWW.USATODAY.COM
Is herd immunity to COVID-19 possible? Experts increasingly say no.
The United States may never reach full herd immunity against COVID-19 experts say, but vaccination can tame the coronavirus.
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