Swine flu: a virus for which no vaccine is available yet

According to the latest news, swine flu cases have been discovered in various parts of the world. There are 11 confirmed cases in the United States; 8 suspected cases have been discovered in a high school in New York City, and more than 200 students in that school have shown mild symptoms of suspected swine flu; New Zealand's Health Minister Tony Ryall said that ten students who returned from Mexico were diagnosed with Type A influenza.