This month's featured stories:

Bronchiolitis is a specific kind of lung infection caused by a virus. The average age of children who get bronchiolitis is 6 months. They are almost never older than 2 years. Click here to read more...

Influenza, or the flu, is a virus infection of the air passages. Significant outbreaks of the flu occur almost every year, usually in the early winter. Each season a different strain of flu virus may be responsible for an outbreak. In some years, the flu strain may be particularly severe and cause many deaths, particularly if pneumonia develops. Click here to read more...