Flu strikes the hygiene hypothesis.
Umetsu
Dale T
DT
D000818:Animals; D001249:Asthma / Q000276:immunology*; D006801:Humans; D006920:Hygiene; D006967:Hypersensitivity / Q000276:immunology*; D007251:Influenza, Human / Q000276:immunology* / Q000821:virology; D051379:Mice; D009975:Orthomyxoviridae / Q000502:physiology*; D012307:Risk Factors