protective face mask, face mask, public transport, travel, pandemic, man, coronavirus, mask, virus, protection, epidemic, covid-19, infection, disease, people, suitcase, person, health, prevention, flu, escalator, luggage, safety, medical, protective, airport, transportation, quarantine, lifestyle, passenger, face, outbreak, influenza, urban, trip, traveler, station, transport, dangerous, 2019-ncov, male, baggage, pneumonia, covid, covid19, health care, lockdown, business trip, caucasian ethnicity