Ключевые слова: adult, background, blind, care, casual, caucasian, city, clinic, crown, disease, epidemic, face, flu, health, health care, illness, infection, influenza, isolated, male, man, mask, medical, medicine, pandemic, people, person, pollution, portrait, professional, protect, protection, protective, quarantine, respiratory, senior, sick, surgical, urban, virus, wall, wearing, white,