(2021). WHO considers Pfizer BioNTech COVID-19 vaccine safe in elderly. Reactions Weekly.
Citação norma Chicago"WHO Considers Pfizer BioNTech COVID-19 Vaccine Safe in Elderly." Reactions Weekly 2021.
MLA citiranje"WHO Considers Pfizer BioNTech COVID-19 Vaccine Safe in Elderly." Reactions Weekly 2021.
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