Ключевые слова: alert, awareness, backgrounds, bacterium, biohazard, biology, cell, cells, contagious, coronavirus, covid, covid19, crown, disease, epidemic, flu, flying, germ, global, health, illness, illustration, immunity, infect, infection, influenza, medical, medicine, micro, microbe, microbiology, microscopic, organism, outbreak, pandemic, particle, pathogen, poster, quarantine, research, risk, science, sick, symptoms, treatment, vaccine, viral, virology, virus,