The most contagious diseases
Mononucleosis Caused by the Epstein-Barr virus (EBV), mononucleosis is often called the kissing disease because of the way in which it is usually transmitted.
Strep throat is one of the most common causes of sore throat in children (20% to 30% of cases) and adults (5% to 15% of cases).
HIV as of 2019, approximately 38 million people worldwide are living with the human immunodeficiency virus.
Human papillomavirus Most sexually active people will develop an HPV infection within their lifetime. There are many types of HPV.
While cytomegalovirus (CMV) is fairly benign in children and adults, it is particularly dangerous for pregnant women.
Chickenpox is a highly contagious disease. Before the development of vaccines, half of all children got the disease by age 5, and 90% by age 12.
One of the most common ways of spreading hepatitis B is through sexual intercourse.
The virus responsible for the flu is particularly contagious and can live up to 48 hours on surfaces.
Common cold Caused by more than 200 different viruses, nasopharyngitis—or the common cold—affects people of all ages every year.