Ключевые слова: absent, adult, allergens, allergic, asian, asthma, bacteria, bug, business, contagious, cough, day, epidemic, face, flue, germs, guy, hay, health, healthcare, hold, illness, infection, infectious, male, mask, medical, pain, paper, person, pollen, poor, preventive, reaction, sick, sinus, sneeze, snot, symptom, tissue, treatment, vaccine, virus, weather, worker,