There has been growing evidence that germs play an important role in protecting against diseases.
Researchers at Brigham and Women's Hospital in Boston claim that bacteria are a necessary part of a healthy immune system. They help build our body's defenses and fight future illnesses, and that our bacteria-fearing lifestyles are increasing levels of asthma, allergy and other autoimmune diseases.
Following mice study scientists concluded that the mice who had been exposed to microbes had stronger immune systems than the germ-free mice. It was noticed that the germ-free mice had exaggerated inflammation in their lungs and colon, similar to what is seen in humans who have asthma and ulcerative colitis.
The study is published in the journal Science.