When they are strict and prolonged, the public health and social measures to contain Covid-19 have proven difficult to respect. This column gives evidence of the different outcomes, as of 23 May, across a sample of 20 tourist-dependent island states with populations of between 100,000 and 10 million. If tourist-dependent islands have been hit hard by the shock, most have fared well, particularly those – like Mauritius – that acted early and imposed a strict lockdown.