The document discusses HIV, mosquito-borne illnesses, and Ebola. It provides information on the origins, transmission, symptoms, and preventative measures for each disease. HIV originated from chimpanzees in West Africa and is transmitted through bodily fluids. Symptoms include coughing and vision loss. Treatment includes antiretroviral drugs. Mosquito-borne illnesses like yellow fever originated in tropical regions and are transmitted by mosquito bites. Symptoms include fever and vomiting. Prevention includes vaccination and insect repellent. Ebola likely originated from contact with bats in West Africa and causes hemorrhaging. Symptoms include fever and diarrhea. Prevention involves hygiene and avoiding contact with infected animals or fluids.