LONDON (AP) - Britain’s health chief has hailed a new study suggesting that a single dose of the Oxford-AstraZeneca COVID-19 vaccine provides a high level of protection for 12 weeks, saying it ...
We have all heard or read about the different variables of SARS-CoV-2, in the same way that we have been informed about the side effects that some vaccines against the virus cause. In Mexico we are in ...
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