"Parasitic infections and other diseases usually associated with the developing world are cropping up with alarming frequency among U.S. poor, especially in states along the U.S.-Mexico border, the rural South and in Appalachia, according to researchers."

The tobacco industry sees its future in recruitment of new smokers, some very young, in the Third World.

"The goal of a new CDC Website, the National Environmental Public Health Tracking Network, is to become a one-stop shop for anyone who wants to investigate environmental causes of illness, from asthma to well water."

"There’s a kind of blue and green scum that can bloom in lakes and ponds across the nation. This scum is called cyanobacteria. For years, scientists have known that this stuff can produce dangerous toxins. Amy Quinton reports now researchers are studying whether there’s a link between cyanobacteria and Lou Gehrig’s disease."

There are parts of the country where 20 percent of partents are opting not to give their children vaccines. That worries the CDC.