1. HIV and AIDS Bellringer List three reasons you think the number of HIV cases in teens is rising. 7 th Grade

2. Copyright © by Holt, Rinehart and Winston. All rights reserved. HIV and AIDS What Are HIV and AIDS? Human immunodeficiency virus (HIV) is the virus that primarily affects cells of the immune system and that causes AIDS. Acquired immune deficiency syndrome (AIDS) is the disease that is caused by the HIV virus, which weakens the immune system. 7 th Grade

3. HIV and AIDS HIV Around the World AIDS is a pandemic, a disease that spreads quickly through human populations all over the world. More than 20 million people have died from AIDS since HIV was first discovered around 20 years ago. 7 th Grade

4. HIV and AIDS What Are HIV and AIDS? People with AIDS cannot fight off illnesses that a healthy immune system could normally defeat. It usually takes 5 to 10 years before a person infected with HIV develops AIDS. 7 th Grade

5. HIV and AIDS HIV Around the World Most scientists think HIV originally came from Africa. AIDS is the leading cause of death in sub-Saharan Africa. HIV is still spreading throughout the world, especially in Asia and Eastern Europe. 7 th Grade

6. HIV and AIDS HIV Origin 7 th Grade Many researchers believe that HIV developed in Africa, where certain chimpanzees carry the simian immunodeficiency virus (SIV). Researchers think that HIV evolved from SIV and that transmission of the virus from chimpanzee to human occurred when chimpanzees were hunted for food.

7. HIV and AIDS 7 th Grade

8. HIV and AIDS HIV Around the World 850,000 to 900,000 people are currently living with HIV infection in the United States. Over 300,000 people are currently living with AIDS in the United States. Each year, 40,000 more people are infected with HIV in the United States. 7 th Grade

9. HIV and AIDS Teens and HIV Teens are one of the fastest-growing groups to become infected with HIV. Over 10,000 teens have been diagnosed with HIV in the United States. More than 4,000 of these have developed AIDS. HIV is rising in teens because many teens do not take the risks of HIV and AIDS seriously, and engage in high-risk behaviors. Any exchange of blood whether from a transfusion, needles or sex puts you at risk from contracting the HIV virus 7 th Grade