De hecho, ahora estamos viendo pruebas convincentes de que las personas contraen covid-19 más de una vez. Si es el caso, eso sugiere que es posible que nunca podamos alcanzar la inmunidad del rebaño.
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Referencia: https://www.youtube.com/attribution_link?a=p_1Hd3jCE6GHgaBj&u=/watch%3Fv%3DqhyEBIpaIaM%26feature%3Dem-lsp

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