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Supraventricular tachycardia (SVT) is a very fast heartbeat that happens from time to time because of a problem with your heart's

Reye syndrome is a very rare but serious disease that is most likely to occur in children younger than 15 years of age. The exact

The surface of red blood cells contains markers that the immune system can recognize—one of these markers is the Rh factor (Rh [D]

People without Rh factor on the surface of their blood cells are Rh-negative and have Rh incompatibility with blood that is Rh

Syphilis is a sexually transmitted infection (STI). It's usually spread through sexual contact. But it can also spread to the

Rh sensitization happens if you have Rh-negative blood and are exposed to Rh-positive blood. Because the blood types don't match

Rheumatic fever results from an infection caused by certain strains of streptococcal bacteria and may be triggered by a strep

Symptoms of a heart attack may include: Chest pain or pressure, or a strange feeling in the chest. Sweating. Shortness of breath

Sexually transmitted infections (STIs) can cause many different symptoms. They may include: Abnormal discharge from the vagina

What is sepsis? Sepsis is a serious reaction to an infection. It causes inflammation across large areas of the body and can damage