SPREADING -

1. Unprotected sex - through body fuilds
2. Sharing needles, blood transfusions, breast feeding

HIV -

1. After infection → mild flu symptoms
2. HIV keeps changing its protein coat to not get destroyed by antibodies
3. Virus affects lymphocyte in immune system, using them to reproduce and then killing them
4. This reduces number of lymphocytes and antibodies, decreasing ability to fight off infections → AIDS [Acquired Immunodeficiency]

Controlling -

1. Limit sexual partners
2. Protected sex
3. Getting tested
4. Raising awareness