Viruses in human communities.
D003139:Common Cold; D004769:Enterovirus Infections; D006801:Humans; D011051:Poliomyelitis; D012141:Respiratory Tract Infections; D014777:Virus Diseases; D014780:Viruses
COMMON COLD; ENTEROVIRUS INFECTIONS; POLIOMYELITIS; RESPIRATORY TRACT INFECTIONS; VIRUS DISEASES