Ключевые слова: 19, adult, antibody, arm, banner, biology, care, chart, chemistry, clinic, concept, cure, development, disease, doctor, flat, glove, health care, healthcare, hospital, immunization, infection, injecting, man, mask, medical, medicine, needle, nurse, pandemic, patient, people, prevention, process, protection, research, science, scientist, syringe, treatment, vaccination, virus, woman,