Science Buzz Chlorine-resistant parasite cryptosporidium, or crypto, is causing nationwide pool closings. When ingested this microscopic menace can cause bouts of illness that last up to two weeks…you’ll know you have it when you experience all of the following: diarrhea, cramps, nausea, vomiting, and fevers. Be sure to exercise caution at your next summer pool party…maybe trade those swimming trunks for a hazmat suit.
abcnews.go.com
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