| A | B |
|---|
| sexually transmitted diseases (STDs) | infections spread from person to person through sexual contact |
| epidemics | occurrences of diseases in which many people in the same place at the same time are affected |
| abstinence | a deliberate decision to avoid harmful behaviors, including sexual activity before marriage and the use of tobacco, alcohol, and other drugs |
| human papillomavirus (HPV) | a virus that can cause genital warts or asymptomatic infection |
| chlamydia | a bacterial infection that affects the reproductive organs of both males and females |
| genital herpes | an STD caused by the herpes simplex virus (HSV) |
| gonorrhea | a bacterial STD that usually affects mucous membranes |
| trichomoniasis | an STD caused by a microscopic protozoan that results in infections of the vagina, urethra, and bladder |
| syphilis | a bacterial STD that attacks many parts of the body and is caused by a small bacterium called a spirochete |
| acquired immune deficiency syndrome (AIDS) | a disease in which the immune system of the patient is weakened |
| human immunodeficiency virus (HIV) | a virus that attacks the immune system |
| opportunistic infection | an infection that occurs in an individual who does not have a healthy immune system |
| asymptomatic stage | a period of time during which a person infected with HIV has no symptoms |
| symptomatic stage | the stage in which a person infected with HIV as symptoms has a result of a severe drop in immune cells |
| EIA | a test that screens for the presence of HIV antibodies in the blood |
| Western blot | the most common confirmation test for HIV in the United States |
| pandemic | a global outbreak of infectious disease |
