The spread of diseases.
D015817:Eye Infections / Q000517:prevention & control; D005135:Eye Protective Devices; D006801:Humans; D019552:Infection Control, Dental / Q000379:methods*; D017758:Infectious Disease Transmission, Patient-to-Professional / Q000517:prevention & control; D053118:Influenza A Virus, H1N1 Subtype; D007251:Influenza, Human / Q000517:prevention & control / Q000821:virology; D013283:Stomatitis, Herpetic / Q000635:transmission; D017201:Virus Shedding