Barbara Kantrowitz is a contributing editor at Newsweek and co-author of The Menopause Book (Workman Publishing, 2009).

While Americans are losing sleep over the H1N1 virus, researchers are studying other infectious threats. From drug-resistant TB to parasitic worms, Barbara Kantrowitz reports on eight diseases to watch—and worry about.

One in 100 American kids has some form of autism, according to new findings—a dramatic jump from two years ago. Barbara Kantrowitz on what's behind the alarming numbers.