portrait of young woman wearing a black protective mask kn95 ffp2 on train station

africa air antibodies antiviral black booster certificate city commuter copy coronavirus covid covid19 delta detected digital ffp2 girl glaxo green kn95 lockdown looking mask merck monoclonal mutated new omicron outdoor pandemic pass passenger passport people person perspective pill pollution protective quarantine sanitary side south space station train transportation travel traveler vaccination vaccine variant winter woman worst xevudy young