A swimming center had a set of medical standards for lifeguards. One standard said that metabolic disorders, including diabetes, would be disqualifying if they threatened an employee’s ability to safely do her job. A lifeguard at the center had type 1 diabetes, which made her dependent on periodic insulin injections. The center was unaware of the lifeguard’s condition when it hired her. Assume that the lifeguard’s diabetes was a disability under the ADA.

The lifeguard’s diabetes was severe and...