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Sunscreens: Protect Your Skin What are sunscreens? Sunscreens protect the skin. They play an important role in blocking ultraviolet (UV) radiation from being absorbed by the skin. UV radiation damages the skin and can lead to sunburns and skin cancer. No sunscreen blocks UV

Diagnosis of Cystic Fibrosis How is cystic fibrosis diagnosed? Newborns are screened for cystic fibrosis (CF) as part of each state's newborn screening program. If the results are positive, it does not mean your baby has cystic fibrosis. More tests are done as described below. In

Maternal and Fetal Testing Overview Most people have healthy pregnancies, and their babies are born without trouble. But people with high-risk pregnancies often need to be closely watched for possible problems. Fortunately, many tests and procedures are available to keep track of

Cancer and Tobacco How are tobacco and cancer linked? Using tobacco makes it more likely that you will get cancer. This includes lung, mouth, throat, bladder, and other cancers. In fact, 1 out of 5 people with cancer in the U.S. got it from smoking. All tobacco products, such as

The Child's Immune System What is the immune system? The immune system protects your child's body from outside invaders. This includes germs, such as bacteria, viruses, and fungi, and toxins (chemicals made by microbes). The immune system is made up of different organs, cells

Anatomy and Function of the Heart Valves What are heart valves? The heart has four chambers: two upper chambers (atria) and two lower chambers (ventricles). Blood passes through a valve before leaving each chamber of the heart. The valves prevent the backward flow of blood

Birth Injuries What is a birth injury? Sometimes during the birth process, the baby may suffer a physical injury that impairs function or structure of their body. This is sometimes called birth trauma or birth injury. It can occur during labor, delivery, or after delivery. Birth

Health Risks of Not Being Physically Active Not being physically active is a risk factor for health problems. If you aren't physically active, you are at higher risk for: Cardiovascular disease High blood pressure Type 2 diabetes Anxiety and depression Some kinds of cancer Facts