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act, agents, an individualal, area, avoid, awareness, bacteria, contagious, contamination, control, disease, distance, etiquette, exposure, flu, group, health, hygiene, infected, infection, infectious, instruction, intervention, isolation, local, microbial, minimize, monitor, outbreak, pandemic, pathogen, physical, possibility, practice, prevention, preventive, protection, proximity, public, quarantine, safety, spreading, strategy, transmission, virus,