[On various disadvantages arising from progress in digestive hygiene].
D003141:Communicable Diseases; D006506:Hepatitis A; D006801:Humans; D006920:Hygiene; D011051:Poliomyelitis; D012499:Sanitation; D014777:Virus Diseases
HEPATITIS, INFECTIOUS; HYGIENE; POLIOMYELITIS; SANITATION; VIRUS DISEASES