Ключевые слова: adult, aged, cold and flu, concept, corona, coronavirus, covid19, disease, doctor, elderly, epidemic, health, health care, healthcare, hospital, immunization, infection, infection prevention, infectious, infectious disease, influenza, injecting, injection, mask, medical, medicare, medicine, middleaged, nurse, pandemic, patient, person, prevention, preventive, procedure, professional, protection, protective, protective mask, quarantine, responsibility, senior, surgical, surgical mask, syringe, vaccinating, vaccination, vaccine, virus, worker,