Ключевые слова: allergy, assistance, background, clinic, coughs, country, danger, disease, doctor, emergency, epidemic, europe, face, flag, flu, health, healthcare, help, hygiene, illness, infection, influenza, mask, medical, medicine, nation, object, pandemic, pollution, protect, protection, protective, quarantine, safety, security, sick, sickness, single, sneezes, south korea, surgeon, surgical, swine, threat, treatment, virus, wear,