Ключевые слова: 2019, 2020, adult, ambulance, antiviral, asia, asian, bacteria, blue, clinic, concept, covid, disease, doctor, emergency, epidemic, face mask, filter, flu, glove, grippe, hand, health care, hospital, human, infection, influenza, medical, medicine, mouth, ncov, nose, patient, protection, rescue, respirator, respiratory, sars, surgical, treatment, virulently, white, world, yellow,