Hantavirus cases on a cruise have raised questions about the source of infection, but onboard rodent sightings are rare.

"The cruise industry is one of the most vigilant industries for sanitation and public health protocols, including cruise lines' voluntary participation in the CDC's Vessel Sanitation Program. Cruise ships are routinely cleaned and sanitized with a frequency that is nearly unparalleled in other settings,

Set sail on Disney Cruise Line's Disney Wonder, featuring fireworks, fine dining and fun for the whole family.