Why get vaccinated? Varicella vaccine can prevent varicella. Varicella, also called "chickenpox," causes an itchy rash that usually lasts about a week. It can also cause fever, tiredness, loss of …

Learn about the side effects, dosages, and interactions of prescription drugs, over-the-counter medicines, herbs, and supplements.

A drug test checks for illegal, prescription or OTC drugs in your body. It's often used by employers, treatment programs, and athletic organizations.

Mar 20, 2025 · Heart disease is the leading cause of death in the U.S. Learn about the different types of heart diseases, and what you can do to try to prevent them.

Coagulation factor tests check how well certain proteins in your blood clot after injury. Learn more.

Jun 19, 2025 · Arrhythmia, also called irregular heartbeat comes in different types. The most common is atrial fibrillation. Read about symptoms and treatment.

Videonystagmography (VNG) measures certain eye movements called nystagmus. It helps diagnose disorders of the vestibular system that can cause balance problems. Learn more.

Jun 24, 2025 · Over a million people in the U.S. have a heart attack each year. Learn the symptoms and get help quickly to prevent permanent heart damage and death.

An RBC antibody screen checks your blood for antibodies that attack foreign red blood cells. It helps make blood transfusions and pregnancy safer. Learn more.

MPV stands for mean platelet volume. An MPV blood test measures the average size of your platelets, which are blood cells that help with clotting. Learn more.