The Ruby Princess cruise ship was docked for disinfection at San Francisco's Pier 27 Thursday morning after a norovirus outbreak affected dozens of passengers and crew.
One passenger is from New York City while the other two are residents of Orange County and Westchester County.
As the number of norovirus cases rise and hantavirus lingers on cruise ships, health officials advise passengers to take precautionary measures to avoid sickness.
Health officials say the risk to the general public in New Jersey remains very low.
The outbreak was reported to the CDC on Thursday, during the cruise ship's April 28 to May 11 voyage.
More than two dozen people from at least 12 different countries left a cruise ship hit by a deadly hantavirus outbreak without contact tracing, officials say