Ключевые слова: back, background, biohazard, care, caution, concept, contagion, coronavirus, covid, dark, diagnostic, disease, epidemic, equipment, gloves, goggles, hazard, health, hospital, illness, infection, influenza, lung, mask, medical, medicine, outbreak, pandemic, pneumonia, protecting, protective, quarantine, red, research, respiratory, safety, test, two, vaccine, virus, viruses, world,