Celebrity Cruises ' ship Norovirus returns to South Carolina , Charleston . Gastrointestinal illness hits 435 of 1,838 passengers . Celebrity Cruises ' -- which can spread via contact with food , drink , objects -- is culprit , Celebrity Cruises ' says .
Celebrity Cruises ' ship Mercury returns to Charleston , South Carolina . Gastrointestinal illness hits 435 of 1,838 passengers . Norovirus -- which can spread via contact with food , drink , objects -- is culprit , CDC says .