The Hygiene Hypothesis - Essay Example

Accordingly, it is important to note that the immune system develops from repeated attempts to keep off disease from the low level of pathogens found in a normal environment; as such, when the germs invade the body in life threatening amounts, the immune system successfully wards them off. The need for this exposure in developed nations some decades back saw to larger families than today. This is because parents believed that the elder child would expose the younger one(s) to pathogens, hence harden their immunity (Ascherio &Munge, 2007).

It has also been observed that children who are taken to baby care institutions are less susceptible to allergies and immune diseases. The research has indicated that, children who had earlier been exposed to measles or hepatitis A are also quite resistant to allergies. Autoimmune diseases are those that the body should be able to naturally protect itself from, as per the hygiene hypothesis. Such include acute lymphoblastic leukemia affecting young people in the developed world. This is a region where young children are less likely to be exposed, and thereby develop the needed immunity.

Unconfirmed evidence also links the hypothesis indirectly to autism, suggesting that an immune disease causes it (Lang, et al. 2010). However, extensive research shows that the hypothesis is of more significance to allergies than to immune diseases (Christensen, 2010). Some of the common allergens, i.e. substances that cause allergic attacks, include pollen, dust, hay, household chemicals, synthetic material, pet fur, some foods and some food preservatives. When these come into contact with the body of the allergic person, his/ her system activates the white blood cells in response to the foreign negative stimulus.

(These cells normally help us to fight disease-causing microorganisms). Once released,