Ключевые слова: adult, allergy, asia, asian, building, china, chinese, city, community, cough, couple, disease, elderly, face, family, fever, flu, headache, health, home, ill, infection, influenza, lifestyles, man, mask, medical, old, outdoor, pain, park, patient, person, pneumonia, pollution, portrait, problem, protection, retirement, sad, safety, senior, sick, taiwan, urban, virus, winter, woman,