By using "targeted" hygiene practices such as hand washing, food safety and toilet hygiene, while encouraging everyday interactions with our microbial world we maximise protection against infection, while maintaining exposure to old friends.
Indeed, I have always believed in the benefits of maintaining exposure to several different fund managers and investment styles within a portfolio, rather than focusing on one particular style or area of the market.
Importantly, we also demonstrated that ages 18-20 exposure to alcohol advertising can be reduced while maintaining exposure to adults as young as ages 21-24.
However, urbanization maintains exposure to the crowd infections that lack immunoregulatory roles, while accelerating loss of exposure to the natural environment.
Antibody tests may have a role in checking for maintained exposure to schistosomiasis in areas that are moving towards elimination (Rollinson 2013).
This chronic emotional stress added to a maintained exposure to doubt and uncertainty feelings might explain the development of great expectations towards liver transplantation, and partially explain the difference towards mental quality of life changes found in the present study.
In our Chilean population, study participants maintained exposure to HPV infection at older ages, as shown by the second peak of DNA infection (53%) around the age of 50-60 years; this exposure could act as a booster, maintaining high antibody titers after age 61 years.
A plastic ring was placed to maintain exposure of the incision and to allow application of sterile saline to prevent drying of the tissue.
