The third gastrointestinal illness in less than two months has hit the National Geographic Sea Bird cruise ship, infecting 18 of 88 people aboard the five-day voyage from Sitka that ended in Juneau on Wednesday, according to the U.S. Centers for Disease Control and Prevention.
The 152-foot-long ship operated by Lindblad Expeditions also had 12 of 90 people infected during a voyage May 26-31 from Juneau to Sitka, and 20 of 95 peopleon a…