This Medical News article is an interview with Stephen Kornfeld, MD. Dr. Kornfeld describes his experience filling in for the ship's ailing physician. This occurred during his vacation cruise. The cause was a hantavirus outbreak. This situation transformed his vacation into a global public health concern. He had to take responsibility for healthcare on board. His role involved addressing the health issues of passengers and crew during a crisis. The article focuses on his personal experience and the challenges he faced.