Archives for February, 2010

What is the Hygiene Hypothesis?

Guest post by Zainab Khan In most western countries, germs have become synonymous with the idea of something bad that needs to be killed as quickly as possible. However, people have long been questioning the validity of these ideas; a few decades ago it was hypothesized that not enough exposure to germ can and does…

It’s that time again. I teach a class in even years on infectious causes of chronic disease, looking at the role various infections play in cancer, autoimmune disease, mental illness, and other chronic conditions. When I last taught the course in 2008, the students were assigned two writing assignments–to be posted here on the blog.…