Travel US cruises are restarting after a COVID-induced hiatus. What happens if the coronavirus gets on board? June 18, 2021June 21, 2021Morgan Hines, USA TODAYComments Off on US cruises are restarting after a COVID-induced hiatus. What happens if the coronavirus gets on board? Cruises are restarting with CDC health protocols to prevent the spread of COVID-19. Even with vaccines, that doesn't mean that sailing is risk-free.