a disease that can be communicated from one person to another

a serious (often fatal) disease of the immune system transmitted through blood products especially by sexual contact or contaminated needles

infectious bacterial disease of human beings transmitted by contact with infected animals or infected meat or milk products; characterized by fever and headache

an acute intestinal infection caused by ingestion of contaminated water or food

an infectious disease of the tropics transmitted by mosquitoes and characterized by rash and aching head and joints

an infection of the intestines marked by severe diarrhea