Hepatitis B is liver inflammation caused by the hepatitis B virus (HBV). HBV is one of five types of hepatitis virus. The others are hepatitis A, C, D, and E. The Centers for Disease Control and Prevention (CDC) state that 2,000 to 4,000 people
Infectious mononucleosis, often called "mono," is caused by the Epstein-Barr virus (EBV). It typically occurs in teenagers, but you can get it at any age. The virus is spread through saliva, which is why some people call it the "kissing disease."
Respiratory syncytial virus, or RSV, is a common virus that can affect individuals of all ages. It is more common among children and infants than it is among adults. For adults and healthy children, RSV causes symptoms similar to those of a cold.