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Yellow fever vaccine can prevent yellow fever. Yellow fever is a serious disease caused by the yellow fever virus. There is no medicine to treat or cure yellow fever.

To prevent Zika infection during pregnancy, you need to protect yourself from mosquitoes and use protection during any sexual activity.

When you have COVID-19, lying on your belly can help your lungs work better. It can help get more oxygen into your lungs more easily. It can help prevent lung injury.

Vaccines can prevent disease. Childhood vaccination is essential because it helps provide immunity before children are exposed to potentially life-threatening diseases.

COVID-19 is caused by a coronavirus called SARS-CoV-2 that spreads easily from person to person. COVID-19 vaccine can prevent COVID-19 disease. Vaccination can help reduce the severity of COVID-19 disease if you get sick.

If conversations about mental health are new to you, it can be hard to know what you need help with. Read about some resources and things you can do to get help.

When an organ like the brain doesn’t get enough oxygen, the condition is called hypoxia. A complete lack of oxygen to an organ is referred to as anoxia. Learn about their causes, symptoms, and treatment.

Neck dissection is a type of surgery. It helps treat cancers of the head and neck.

Iron helps the blood cells carry oxygen. When you don't get enough iron, you may feel tired and lack energy. Anemia ("tired" blood) is a health problem that can occur when the body's iron levels are very low. Our bodies don't make iron, so we must get it from foods or supplements.