Ключевые слова: 25, air, allergic, allergy, asian, bad, care, corona, coronavirus, cough, couple, covid, covid19, dirty, dusk, elder, environmental, face, health, home, house, illness, influenza, mask, medical, old, outdoor, people, pm, polluted, pollution, prevention, protect, protection, quality, road, senior, sick, sickness, smell, street, symptom, toxic, unhealthy, village, virus, weather, woman, worry, young,