young woman with black medical mask kn95 ffp2 using telephone in the train station with timetables on the background

air autumn black business certificate commuter covid day delta digital disease distancing epidemic fall ffp2 girl green holding infections kn95 light mobile mobility morning new omicron pass passenger passport perspective phone pollution prevention protection protective public rail red restrictions sanitary smart smartphone social spring station student telephone timetables train transport transportation travel traveler using vaccination vaccine variant winter woman young