Blood – everyone's got it. In fact, an adult who weighs between 150 and 180 pounds has around 1.2 to 1.5 gallons of blood in their body. This makes up approximately 10% of an adult’s weight. Blood ...

Blood types are a classification of blood based on the antigens present in red blood cells. In the United States, O-positive is the most common blood type, and AB-negative is the rarest. A blood ...

Common cold viruses include rhinoviruses, adenoviruses, human parainfluenza virus, and respiratory syncytial virus. Most resolve on their own with rest and over-the-counter medications. Share on ...

The release of 2022 cancer data gives the latest look into which types of cancer are most prevalent around the world as population growth expects to drive global cases as much as 77% by 2050. There ...