Though swimming is a popular sports activity with many health benefits, swimming-related illness in the US is on the rise. In a fun-filled reminder, experts show you how to keep your family healthy and safe when you get 'In the Swim of Things' this summer. The main culprit: a chlorine-resistant parasite known as Cryptosporidium. Comments on this video are allowed in accordance with our comment policy: http://www.cdc.gov/SocialMedia/Tools/CommentPolicy.html This video can also be viewed at http://www.cdc.gov/cdctv/