👉 Cholera is a disease that causes diarrhea and vomiting. It occurs when bacteria enter the body through contaminated water or food, causing inflammation in the digestive system and leading to the formation of pus cells in the intestines. Cholera can be transmitted to humans by ingestion of contaminated water or food, and it is highly contagious. The symptoms of cholera include fever, chills, headache, nausea, vomiting, and diarrhea. If left untreated, cholera can be fatal.