Ключевые слова: air, airborne, bacterium, breath, care, city, concept, contagious, corona, coronavirus, cough, danger, death, disease, droplet, emission, environment, epidemic, face, facial, fever, filter, flu, global warming, harm, health care, hearth, human, illness, infection, infectious, influenza, male, man, mask, medicine, mouth, nose, novel, person, pollution, portrait, protect, protection, respiratory, sick, viral, virus,