Rebecca Davis

After years of being beaten up, this teen decided to take justice into his own hands. A school district in Oregon showed him a better way to solve his problems.

After trying one treatment after another for his leukemia, 20-year old Aaron Reid enrolled in a study to test an experimental therapy using modified cells from his own body.

Infants do better with their parents, studies find, as long as parents have support to get and stay sober. This program starts during pregnancy, to rally and train a strong family support network.

Nervous mothers and dads once had only family and friends to turn to for advice on kids. Then, in 1912, the U.S. government created an agency devoted to children, and queries from moms poured in.

African-American women are more likely to lose a baby in the first year of life than women of any other race. Scientists think that stress from racism makes their bodies and babies more vulnerable.

"You must leave now," thousands of Americans from Puerto Rico to Oregon to Florida, Montana, Texas and beyond were told, as floods, fire and wind threatened their lives. Some said no.

Nicole was only 23 when she had a double mastectomy following a breast cancer diagnosis. After she recovered, Nicole got a chest tattoo that symbolized how she wants to live life after cancer.

Melanoma can be a deadly skin cancer, but 10 years ago, biologist Jim Allison figured out a way to tweak the body's immune system to go after those malignant cells. Some patients are now cancer-free.

When Jimmy Carter said his advanced melanoma was gone, he credited immunotherapy, treatments that harness the immune system to fight cancer cells. This idea dates back to a 19th-century doctor.

One of the most important medical advances may also be the simplest: hand-washing. It's the best defense against spreading disease. And its power was discovered long before anyone knew about germs.