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There may be a good reason why our bodies are covered with bacteria: It turns out that bacteria fights off viruses.

Science Daily quotes researcher David Artis as saying, "From our studies in mice, we found that signals derived from these beneficial microbes are essential for optimal immune responses to experimental viral infections. In one way we could consider these microbes as our ‘brothers in arms’ in the fight against infectious diseases."
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We may be dirty, but exposure to common antibacterial chemicals and preservatives found in soap, toothpaste, mouthwash and other personal-care products may make children more likely to have food and environmental allergies.

Researcher Jennifer Savage says, "We saw a link between level of exposure, measured by the amount of antimicrobial agents in the urine, and allergy risk, indicated by circulating antibodies to specific allergens."

The antibacterials and preservatives THEMSELVES do not necessarily cause the allergies, but instead may play a role in the development of the immune system.
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