David Abel’s 50th wedding anniversary luxury cruise began with him eating his fill and enjoying the sights of East Asia. It’s ending with him quarantined in his cabin aboard the Diamond Princess for two extra weeks, eating a “lettuce sandwich with some chicken inside” and watching 20 infected people escorted off the ship, heading for hospitals for treatment of a new virus. Abel is among hundreds of passengers on two cruise ships — in Japan and Hong Kong — caught in the drama and fear about the little-understood virus that just emerged in December....