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Hepatitis A vaccine can prevent hepatitis A. Hepatitis A is a serious liver disease.

Hepatitis B vaccine can prevent hepatitis B. Hepatitis B is a liver disease that can cause mild illness lasting a few weeks, or it can lead to a serious, lifelong illness.

Risk factors are things that make you more likely to have a disease or condition. Find out about risks you might have for high blood pressure and which ones you can change.

Hemoglobin E trait is an inherited blood disorder. That means it's passed down through your parent’s genes. Read on to learn more.

Hemoglobin C disease is caused by abnormal hemoglobin, which is the part of red blood cells that carries oxygen to cells, tissues, and organs. Learn more about the condition, including causes, symptoms, and treatment.

Graves disease is an autoimmune disease. With this disease, antibodies cause the thyroid gland to make too much thyroid hormone. This is known as hyperthyroidism. Excess thyroid hormone in the bloodstream leads to the body's metabolism being too active. It can cause problems such as weight loss, nervousness, fast heartbeat, tiredness, and other issues. It’s an ongoing (chronic) condition that needs lifelong treatment.

When you miss a dose of your blood pressure medicine, you might not notice a difference. But your body does.

Not everyone who has had a heart attack needs open-heart surgery, such as a bypass operation. Read on to learn about other treatment choices.

Over the long-term, your quality of life is tied to how severe your heart attack was and how it was treated. Beyond that, any change will depend largely on you.