Question: A student returns from a student teaching assignment in Zimbabwe. On the way home she swam in Lake Malawi. She is found to have schistosomiasis. Four of the following answers are good advice on how to prevent schistosomiasis. Which one is bad advice?
A. In risk areas, don't swim in fresh water rivers or lakes
B. Swimming in chlorinated pools is safe
C. Swimming in ocean salt water is safe
D. Toweling off vigorously after contact with potentially contaminated water decreases your risk
E. Wading in water up to your knees is safe for brief periods of time