Ключевые слова: african, alert, allergen, allergy, attention, barrier, biohazard, breathing, caution, celsius, defense, diagnosis, diagnostic, disease, doctor, epidemic, fever, flu, global, graphic, health, healthcare, help, hospital, hygiene, icon, illness, illustration, immunity, infection, isolated, laboratory, mask, medical, medicine, meter, person, pollution, protective, risk, safety, sickness, symptoms, temperature, vaccine, viral, virus, woman,