As we chill (sweat) in the sleepy haven of South Golden Beach in New South Wales for a brief Christmas break, health authorities report Cryptosporidium has sickened at least 200 people in December and are warning people with diarrhea to stay out of shared pools.

The Sydney Morning Herald reports almost half of the cases were in children under 10-years-old. 

Health authorities have issued the warning urging people to stay out of shared swimming pools and water parks.

The biggest outbreak of cryptosporidiois was recorded in Sydney in 1998, when there were more than 1,000 confirmed cases.

Sydney was forced to boil its drinking water because it was found to be infected with the pathogens cryptosporidium and giardia.