Individuals can contract HIV without an open wound if HIV-infected fluids come in contact with a mucous membrane or are injected directly into the bloodstream. Mucous membranes are found inside the vagina, rectum, opening of the penis and mouth, according to the Centers for Disease Control and Prevention.
The human immunodeficiency virus, HIV, attacks the immune system and makes an individual more susceptible to illness, states Healthline. HIV can be transferred from one person to another during sex, through sharing needles, by receiving an infected blood transfusion, or by being born to an infected individual, according to AIDS.gov. Pre-seminal fluid, semen, blood, rectal fluids, vaginal fluids and breast milk can all spread HIV, reports the CDC.
As of March 2015, 1.2 million people age 13 and over are living with the HIV virus, and roughly 50,000 new cases of HIV occur each year, as stated by AIDS.gov. One in five individuals do not know they have been infected with the virus, claims the U.S. Department of Health & Human Services. If left untreated, HIV can develop into acquired immunodeficiency syndrome, AIDS, and this disease occurs when the immune system is so weak it cannot fight off any illnesses, according to Healthline.