Ключевые слова: adult, allergens, allergy, asthma, bacteria, blowing, cold, common, contagious, cough, disease, epidemic, face, female, flu, girl, handkerchief, ill, infection, napkin, nose, one, park, pollen, pollution, problem, reaction, respiration, runny, season, seasonal, sick, sickness, sneeze, sore, spring, throat, tissue, unhealthy, unwell, virus, woman, young,