Ключевые слова: ache, bacteria, breathe, contagious, covid19, crowd, disease, epidemic, europe, fever, flu, happiness, hazard, healthcare, human, hygiene, ill, illness, infected, infection, infectious, influenza, information, lady, mask, medical, medicine, mobilephone, network, panic, patient, phone, prevention, problem, protect, protective, respiratory, sad, safety, scare, sick, sickness, sms, social, spreading, symptom, vaccine, virus, wearing,