The Grand Princess cruise ship that traveled from San Francisco to Mexico in mid-February has two presumptive 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 confirmed cases in Sonoma County , California and in Placer County , California among passengers who had been aboard the Grand Princess on a cruise from San Francisco , California to Mexico during the previous month . *
2020 coronavirus pandemic in the United States