The idea that there might be a link between the rise in allergic disease and reduced microbial exposure as a result of measures introduced to protect against infection was first proposed in 1989.This so-called hygiene hypothesis, as outlined by Dr David Strachan, proposed that a lower incidence of infection in early childhood could be an explanation for the 20th century rise in atopic diseases.
( Bloomfield SF, Rook GA, Scott EA, Shanahan F, Stanwell-Smith R, Turner P. Time to abandon the hygiene hypothesis: new perspectives on allergic disease, the human microbiome, infectious disease prevention and the role of targeted hygiene. Perspect Public Health. 2016;136:213-24.)
I agree with hypothesis because my master's thesis was about allergies.
I don't think I understand your question, Hamidreza. Is this a question for coursework? You seem to be directly quoting from this article by Bloomfield et al (Introduction, 2nd paragraph), so that article and its reference list would probably be a good place to start your research. If you are ever directly quoting, even here, please do attribute the authors as they deserve all credit for their words. Best wishes. Article Time to abandon the hygiene hypothesis: New perspectives on ...
