Ключевые слова: air, asia, asian, bird, board, chinese, city, cough, crowded, disease, display, eye, female, flu, frown, girl, ill, illness, infection, infectious, influenza, japanese, korean, lots, many, mask, medical, metro, people, platform, pollution, protection, protective, public, railway, screen, sick, signage, station, taiwanese, tokyo, train, transport, travel, traveler, urban, virus, waiting, wearing, woman,