Ключевые слова: ai generated, allergy, background, bacteria, bacterium, biology, cell, cold, concept, contagion, contagious, epidemic, epidemiology, flu, fungi, health, human, hygiene, ill, illness, immune, medical, medicine, microbe, microbiology, microscopic, molecules, organism, outbreak, pandemic, research, retrovirus, science, scientific, sickness, viral, virology, virus,