The cruise industry’s attempted relaunch has had a rocky start, with four lines reporting confirmed or suspected Covid-19 cases among crew or passengers.

AIDA Cruises, TUI Cruises, Hurtigruten and Paul Gauguin Cruises claim they have implemented strict protocols to minimise the risk of an outbreak on board.

However, Norway’s Hurtigruten revealed on Saturday that 36 crew on its 21,800-gt expedition cruiseship Roald Amundsen (built 2019) had tested positive for the coronavirus.