 There are currently 15 cases in the United States, and 11 states are reporting the disease. According to the Indiana Department of Health, nine pools are infected with West Nile virus in Indiana. Some people show no signs of symptoms, but about 20% could develop the following. Body aches, headache, joint pains, vomiting, diarrhea, and rash. There is no medication or vaccine for West Nile virus. You must protect yourself and your family from mosquito bites.