coronavirus, prompting the vessel to return early to Singapore on Wednesday.Royal Carribbean said in a statement that a guest on the Quantum of the Seas ship “tested positive for coronavirus after checking in with our medical team."“We identified and isolated all guests and crew who had close contact with this guest, and each of those individuals have subsequently tested negative for the virus," it said.The ship returned to port in accordance with government protocols, and will allow guests to leave after a review of contact tracing is completed, it said.Singapore recently began a “safe cruising" pilot program allowing cruise ships to make round trips to Singapore with no port of call in between.