(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 Citation"WHO Considers Pfizer BioNTech COVID-19 Vaccine Safe in Elderly." Reactions Weekly 2021.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.