The mystery ailment that has laid low dozens of British troops in Afghanistan has been identified, the British Ministry of Defense said Saturday. Officials told journalists at a briefing in London that it was winter vomiting, an illness characterized by one or two days of severe vomiting and diarrhea. TWENTY-TWO BRITISH servicemen reported sick on Friday with the illness that has struck a field hospital at Bagram air base near Kabul this week, taking to 40 the total number afflicted. Scotland was recently hit by an outbreak. “Winter vomiting disease is caused by a group of viruses called small round...