THE HAGUE, Netherlands (AP) — Dutch emergency services say that dozens of sick passengers on a cruise ship that has moored in Rotterdam have been kept onboard for treatment. The sickened passengers were on board the AIDAperla, which arrived in Rotterdam on Thursday morning. The ship's German operator Aida Cruises says in a statement that crew increased hygiene measures after "gastro intestinal infections occurred among passengers.Read more on NewsOK.com