Two passengers who had been aboard the Grand Princess cruise ship that traveled from San Francisco to Mexico are confirmed cases of coronavirus due to the pandemic in the US .
The new case , a man in his 50s , is in isolation at his home ; the new case is linked to at least two other cases , one each in Sonoma County , California and inPlacer County , California , in passengers who had been aboard the Grand Princess on a cruise from San Francisco , California to Mexico in mid-February . *
2020 coronavirus pandemic in the United States