Swine flu ain't gone yet. An assistant principal has been hospitalized in critical condition with the H1N1 virus and the city is closing down three public schools in Queens after hundreds of students have come down with flu symptoms. The assistant principal works at Intermediate School 238 in Hollis and may have had a previous condition that made him vulnerable to the virus. At one of the closed schools, Intermediate School 5 in Elmhurst, 241 students were absent from classes today. The third school is PS 16 in Corona where 29 students reported flu-like symptoms to the nurse's office today. All three schools are expected to be shut down for tomorrow and all of next week. Mayor Bloomberg said, "While the symptoms of H1N1 flu seem to resemble those of seasonal flu, the H1N1 virus seems to spread rapidly, so we’re closing these schools in order to slow transmission.” Just earlier today the Health Department had reemphasized that there have been no deaths related to swine flu in the city and that all who have been affected have recovered or are recovering. The mayor is expected to have another press conference this evening.