Ключевые слова: 40s, adult, barricade, barrier, block, caucasian, close up, concerned, contagious, disease, epidemic, epidemiologist, epidemiology, expertise, eyewear, forbidden, gesture, gesturing, goggles, hand, health, healthcare, illness, male, man, mask, medical, medicine, occupation, outbreak, pandemic, professional, protective clothing, researcher, restricted access, restriction, scientific, scientist, sign, specialist, stop, virology, virus, worker,