HIV/AIDS damages the immune system over time and is caused by the HIV virus. It is spread through unprotected sex, contaminated blood transfusions, sharing needles, and from mother to child during pregnancy, childbirth, or breastfeeding. Symptoms of HIV/AIDS range from flu-like symptoms in early stages to infections and weight loss in later stages. HIV/AIDS affects society by impacting families, health systems, businesses, and education. Preventative measures include education, regular testing, monogamy, condom use, treatment during pregnancy/childbirth, avoiding breastfeeding or needle sharing.