Extensive Spread of SARS-CoV-2 Delta Variant among Vaccinated Persons during 7-Day River Cruise, the Netherlands
We investigated a large outbreak of SARS-CoV-2 infections among passengers and crew members (60 cases in 132 persons) on a cruise ship sailing for 7 days on rivers in the Netherlands.Whole-genome analyses suggested a single or limited number of viral introductions psr-sx600 consistent with the epidemiologic course of infections.Although some precau