Ключевые слова: agents, ailments, airborne, attack, bacteria, causative, cells, close, communicable, conditions, contact, deadly, detection, disease, droplets, endemic, epidemic, germs, harmful, illness, infectious, invasion, microbial, microorganism, pandemic, pathogenic, presence, replication, reproduction, ri, screening, sign, spread, spreading, symptoms, testing, transferable, transmissible, transmission, viral, virus,