Ключевые слова: black, caucasian, chinese, clinic, corona, coronavirus, covid, disease, diverse, diverse group, doctor, epidemic, face, face mask, female, flu, four people, group, health, health healthcare, healthcare, hospital, illness, infection, male, male female, man, mask, mature adult, medical, medicine, mid adult, ncov, nurse, operating, operation, outbreak, pandemic, people, performing, prevention, quarantine, service, surgeon, surgery, surgical, theatre, virus, wearing, woman, young adult,