Ключевые слова: adult, asian, background, biology, blue, care, cell, concept, contagious, coronavirus, disease, doctor, epidemic, equipment, flu, health, holding, human, illness, infection, male, man, mask, medical, medicine, microbiology, model, molecule, outbreak, pandemic, person, pharmacy, prevent, protect, protection, protective, safety, sample, scientist, syringe, test, tube, vaccine, virus,