Hundreds of people aboard two cruise ships in the Caribbean fell ill due to norovirus , the latest instances in which the stomach bug has thwarted vacationers at sea . NEW : CDC confirms norovirus on Royal Caribbean ship that returned Wednesday . Princess Cruises ship arrives in Houston after norovirus sickens 178 passengers . The cruise line said it is working with the Centers for Disease Control and Prevention to investigate what caused the outbreak aboard its ships. One passenger tells KHOU he was made to feel like `` prisoner '' after falling ill on cruise .
NEW : CDC confirms norovirus on Royal Caribbean ship that returned Wednesday . Princess Cruises ship arrives in Houston after norovirus sickens 178 passengers . The cruise line said it is working with the Centers for Disease Control and Prevention to investigate what caused the outbreak aboard its ships. One passenger tells KHOU he was made to feel like `` prisoner '' after falling ill on cruise .