The state of North Korea's health problems have been highlighted by the defection of one soldier to the south.
In the U.S., 12 to 19 million people get sick from waterborne infectious disease each year.
Turns out sewer systems can only do so much to cut down on infections.
This parasite, carried by a sandfly, kills tens of thousands pf people every year. Treatment exists, but the sickness can still disfigure and kill people.
Climate change is enabling this organism, which causes meningitis, to inhabit new regions.
The amoeba was living in a rapids course at dangerously high levels.
Researchers say ivermectin, a drug designed to fight parasitic worms, could also help fight the spread of malaria.
The icky parasite will make you think twice before jumping into that public pool.