Ключевые слова: alcohol, apartment, avoid, building, city, close, concept, covid, danger, dark, disease, door, elevation, elevator, entrance, exit, flu, gel, hand, health, hospital, indoor, infection, influenza, lamp, lift, lobby, machine, medical, metal, neon lights, office, outbreak, pandemic, people, press, prevention, public, push, silver, stainless, virus, warning, wash,