Quarantined cruise ship in Japan became incubator for virus

TOKYO — As an extraordinary two-week quarantine of a cruise ship ends Wednesday in Japan, many scientists say it was a failed experiment: The ship seemed to serve as an incubator for the new virus from China instead of an isolation facility meant to prevent the worsening of an outbreak. Since the virus was identified late last year in central China, it has sickened tens of thousands of people and killed more than 1,800. ADVERTISING As of Tuesday, 542 cases of the virus, known as COVID-19, have been identified among the 3,711 quarantined passengers and crew, making the ship the site of the most infections outside of China. The Diamond Princess cruise ship is also the only place where...