An unidentified school employee pastes a note on the door of the Susan B. Anthony School in the Queens borough of New York is shown Thursday May 14, 2009. Mayor Michael Bloomberg said that four students and the assistant principal have documented cases of swine flu at the Queens middle school. More than 50 students have gone home sick with flulike symptoms at the school, he said. Bloomberg said that three schools, with more than 4,000 students altogether, would be closed for at least a week because ‘there are an unusually high level of flulike illnesses at those schools.’