Ключевые слова: 2020, air, background, breath, care, citizens, corona, coronavirus, danger, death, defense, demonstration, disease, distribution, doctor, epidemic, epidemiology, face, flu, health, healthcare, hygiene, illness, infection, infectious, influenza, information board, isolated, mask, medical, medicine, microorganisms, outbreak, pandemic, people, pollution, prevent, prevention, protect, protection, protective, quarantine, safety, sick, surgical, virus, wearing, white,