Ключевые слова: agent, aids, attack, care, cell, cellular, closeup, contagion, contaminate, contaminated, corona, covid, defense, disease, entering, epidemic, epidemiology, flu, hepatitis, human, illness, immune, immunity, immunization, incubation, infect, infected, infection, influenza, medical, membrane, microbiology, microscopic, organism, pandemic, particle, pathogen, plaque, process, receptors, replication, resistance, spread, symptoms, tentacles, transmission, vaccine, virology, virus, wall,