use the mask! young woman wearing protective face mask showing thumbs up with modern city street on the background

against agree agreement antibodies anticovid background biontech city clinical corona coronavirus covid curfew decrease developed distancing epidemic face girl herd immune immunity immunization infection lockdown mask medications modern monoclonal new normal optimistic outdoor pandemic people person pfizer positive protective safe safety sarscov second showing social street system tested the thumbs treatment trials use vaccine virus wave wearing winter woman young