16 dead in flu outbreak; Mexico closes schools, studies strain for link to new US fluMEXICO CITY — Mexico City closed schools across the metropolis of 20 million Friday after at least 16 people died and more than 900 others fall ill from what health officials suspect is a new strain of swine flu. World health officials worried that it could mark the start of a flu pandemic. Flu epidemic prompts Mexico City to suspend all school, university classes, as strain studiedMEXICO CITY — Mexico City has suspended classes at schools and universities to contain what could be a new flu strain. Seoul-based institute says new vaccine to give poor cheaper protection against choleraSEOUL, South Korea — Scientists have developed a new cholera vaccine that could give poor populations much cheaper protection against the disease, an international health agency said Monday. |