Acute lymphocytic leukemia (ALL) is a type of cancer that affects your blood and bone marrow. According to the National Cancer Institute, B-cell acute lymphoblastic leukemia is the most common type of ...

Hepatitis is the medical term for inflammation (swelling) in your liver. Hepatitis B is liver inflammation caused by infection with the hepatitis B virus (HBV). Inflammation can damage your liver.

There are four types of influenza virus. Influenza A is the most common, followed by influenza B. Both are highly contagious and have similar symptoms, including fever, chills, and body aches.