On Sunday, the Centers for Disease Control and Prevention (CDC) published a report on the increase in "crypto" outbreaks over the course of the last decade.
The majority of outbreaks were connected to pools, lakes and splash pads.
The implication is cryptosporidiosis, a "profuse, watery, diarrhea that can last up to 3 weeks", and can even lead to life-threatening complications for people who are considered immunocompromised, either due to their age or other illness.
"Young children can get seriously sick and easily spread Crypto", said Michele Hlavsa, Chief of the CDC's Healthy Swimming Program.
Swallowing water from pools and water playgrounds was the #1 leading cause of contamination and outbreaks amongst humans between 2009 and 2017, according to the CDC.
Youngsters sick with diarrhea should not be placed in child care, according to the CDC, and following a cryptosporidiosis outbreak, child care workers should clean surfaces with hydrogen peroxide, as chlorine bleach is an ineffective means of killing the parasite.
At a Glance Outbreaks of a parasitic disease have risen roughly 13 percent per year.
The CDC says almost 8,000 people in the US and Puerto Rico have been infected with the parasite since 2009.
For the record, I'm not sharing this information to scare you right out of swimming in a pool ever again, but best practice should definitely be CLOSE YOUR MOUTH COMPLETELY while you do it.
There were 444 outbreaks in the U.S.in that eight-year period, resulting in 7,465 people becoming sick, 287 hospitalizations, and one death.
The concern with crypto, according to the CDC, is that it's tough to kill.
Families not allow kids to swim if they have diarrhea.
In most healthy people, Crypto produces a bout of diarrhea, and the infection usually clears within two weeks.
People who come in contact with livestock should wash their hands thoroughly and remove any shoes or clothing to avoid contaminating other environments, like their homes.