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Childhood non-Hodgkin lymphoma treatment can include chemotherapy, radiation therapy, targeted therapy, and high-dose chemotherapy with stem cell transplant. Learn more in this expert-reviewed summary.

A fact sheet that describes the PSA screening test for prostate cancer and explains the benefits and limitations of the test.

Encephalitis, inflammation of the brain, is caused by several different infectious and noninfectious entities. Encephalitis can be an uncommon complication of a common infection, such as infection with a herpes virus or with any of several vaccine-preventable disease viruses, or a predictable presentation of a rare pathogen, such as the ameba, Naegleria fowleri.

To screen for iron-deficiency anemia your doctor may order a blood test called a complete blood count (CBC). Prevention of iron-deficiency anemia includes consuming enough iron and controlling other medical conditions that are risk factors for iron-deficiency anemia.

Pneumonia occurs when certain bacterial, viral, and fungal infections cause inflammation in the air sacs, or alveoli, of the lungs. Some of the more common causes in the United States include Streptococcus pneumoniae or pneumococcus bacteria, the influenza or flu virus, and respiratory syncytial virus (RSV).

Mitral valve prolapse is a condition in which the flaps of the mitral valve are floppy, or prolapsed, which can prevent the seal from forming, which results in a backflow of blood in the left atrium as blood is pumped through the heart.

Your risk of pneumonia may be higher because of your age, environment, lifestyle habits, and other medical conditions.

Persons using assistive technology might not be able to fully access information in this file. For assistance, please send e-mail to: mmwrq@cdc.gov.

For Hepatitis Awareness Month and national Hepatitis Testing Day on May 19th, learn more about the different types of viral hepatitis. Find out if you should get tested or vaccinated by taking a quick, online Hepatitis Risk Assessment.

Meningococcal Vaccine for Preteens, Teens, and Adolescents