COVID-19 on board a cruise ship: medical management.

This study can allow a ship's doctor to better understand the viral dynamics in case of a COVID- 19 cluster and to anticipate the exit of the crisis. Repeated tests during the active phase of the epidemic are necessary in case of a large cluster to know where to place oneself on a typical epidemic curve. Isolation and barrier measures advised by the ship's doctor remain the only weapons that can limit its magnitude.