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Leukemia in Children What is leukemia in children? Leukemia is cancer that starts in young (immature) blood cells. It’s the most common kind of cancer in children. The leukemia cells grow in bone marrow and then go out into the blood. The bone marrow is the soft, spongy center of

Breast Cancer: Surgery Surgery is a common treatment for breast cancer. It’s done to remove as much of the cancer as possible. You have many surgical choices. The type of surgery you need depends on: The size of the breast lump or tumor and where it is in your breast. The type of

Diabetes During Pregnancy: Risks to the Baby What types of diabetes can happen in pregnancy? When a baby is born to a mother with diabetes, the baby is at risk for problems. People with diabetes have high levels of sugar in their blood (hyperglycemia). Over time, this can lead to

COVID-19 What is COVID-19? COVID-19 is an infectious disease that most often causes a respiratory illness. You may hear it called COVID or coronavirus disease 2019. It's caused by a virus called SARS-CoV-2. There are many types of coronaviruses. They are a common cause of

Medical Conditions and Pregnancy Certain health conditions may complicate a pregnancy. But with the correct care, you can have a healthy pregnancy even with health challenges. If you are concerned about a medical problem during pregnancy, talk to your doctor or midwife. Diabetes

HIV/AIDS What is HIV/AIDS? The term AIDS refers to the most advanced stages of an infection caused by the human immunodeficiency virus (HIV). The current definition of AIDS includes: All HIV-infected people who have fewer than 200 CD4+ T cells (also called T4 cells or just T

Persistent Depressive Disorder in Children What is persistent depressive disorder in children? Persistent depressive disorder is a type of depression. Depression affects a child's body, mood, and thoughts. It can disturb eating, sleeping, or thinking patterns. It's not the same

Hepatoblastoma in Children What is hepatoblastoma in children? Hepatoblastoma is a very rare cancer that starts in the liver. It usually affects children younger than 3 years of age. About half of all children with it are diagnosed before age 1. It usually doesn't spread

Osteoporosis What is osteoporosis? Osteoporosis is a disease that causes weak, thinning bones. This puts the bones at greater risk of breaking. The bones most often affected are the hips, spine, and wrists. What causes osteoporosis? Researchers don't know the exact cause for

How Were the COVID-19 Vaccines Made So Fast? Vaccines for COVID-19 are now widely available. In the past, it’s taken many years to create a vaccine that’s ready for public use. But over decades of creating vaccines, research groups and public health agencies have been making the