An anal fissure is a small tear or split in the lining of the anal canal. Anal fissures are common among infants, but they can occur at any age.Anal fissures are also common among women who have recently given birth and people who have inflammatory bowel disease.n anal fissure is a small tear or split in the lining of the anal canal. Anal fissures are common among infants, but they can occur at any age.
The cumulative number of estimated AIDS cases in the U.S. is estimated to be 1.8 million. Over 1.1 million people are estimated to be currently living with HIV in the U.S. About 50,000 people are infected with HIV in the U.S. each year, a number which has remained fairly steady over the last decade.
In the United States, an estimated 9,000 young people ages 13 to 24 became infected with HIV in 2011, the most recent year for which there are CDC data. Among American youth, gay and bisexual males and black males have especially high rates of HIV infection.