Michele C. Hlavsa, RN, MPH, is chief of CDC’s Healthy Swimming Program. Her areas of expertise include recreational water–associated illness, particularly when caused by Cryptosporidium. She has worked on a number of investigations of outbreaks of recreational water–associated illness and collaborates with U.S. and international public health authorities and the aquatics sector to develop science-based prevention and control measures. She has a bachelor’s degree in nursing from the College of New Jersey and a master’s in public health/epidemiology from Emory University. Hlavsa was an Epidemic Intelligence Service Officer at CDC prior to joining the Healthy Swimming Program.