Tragedies like this have nothing to do with going swimming or not. It is a direct result of the systematic and DELIBERATE impairment of the human immune system through chronic exposure to heavy metals, nutritionally depleted soil and agriculture, immunosuppresive chemicals and food additives , and micro flora obliterating Antibiotics .
A human being should never fall victim to a protozoa.
Take care of yourselves people- sunshine, organic raw foods, pure water, excercise, and a clove of raw garlic a day.