Ключевые слова: adult, background, biology, blue, care, cell, china, concept, contagious, corona, coronavirus, covid19, danger, disease, doctor, epidemic, face, flu, glove, health, holding, hospital, human, ill, illness, infection, male, man, mask, medical, microbiology, model, molecule, outbreak, pandemic, person, pharmacy, pollution, prevent, prevention, protect, protection, protective, safety, sample, scientist, sick, test, tube, virus,