Shark Week continues on Tuesday, July 22, with the special “How to Survive a Shark Attack.” The special airs at 9 p.m. ET on ...

"How to Survive a Shark Attack" airs on Tuesday, July 22 at 9 p.m. Here's everything you need to know to watch.

Then there’s giardia, a parasite that often enters pools when people have accidents in the water or don’t rinse off properly.