The good side of a viral infection?

A gene linked to asthma and allergies also has a role in hepatitis A viral infections, according to a new study. This unexpected discovery has investigators speculating that a past infection with the hepatitis

A virus may protect some people from asthma and allergies.

There’s been a dramatic rise in the number of people with these conditions over the past few decades, and some scientists blame it on modern society’s cleanliness.