Ключевые слова: abstract, air, allergic, allergy, bacteria, bacterium, care, chilly, cold, colorful, contagious, diagnosis, disease, diversity, flu, flue, flutter, flying, germ, grippe, healthcare, heaps, illness, illustration, indoors, infection, infectious, influenza, isolated, living, microbe, microorganism, pollution, problem, propagation, season, seasonal, sick, sickness, smog, something, spreading, symptom, unhealthy, virus, watercolor, weakness, weather, white, winter,