A hypothesis first proposed in 1989 that reduced exposure to ubiquitous environmental microorganisms was a cause of the increased frequency of patients with allergies observed over the course of the mid- to late-20th century

Hypothesis Proposed Reduced Exposure Ubiquitous Environmental Microorganisms Increased

The hygiene hypothesis proposes that reduced exposure to ubiquitous environmental microorganisms is a cause of the increased frequency of allergies observed in the mid- to late-20th century.

La hipótesis de la higiene postula que la reducción de la exposición a microbios ambientales ubicuos es una causa del aumento de la frecuencia de alergias observado a mediados del siglo XX.

Front	A hypothesis first proposed in 1989 that reduced exposure to ubiquitous environmental microorganisms was a cause of the increased frequency of patients with allergies observed over the course of the mid- to late-20th century
Back	hygiene hypothesis

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