Swine flu crossed the 4,000-mark this year in the capital Delhi but seems to have subsided with the rising temperature.
Dr Charan Singh, nodal officer for swine flu, Health department, said, "Every year, with a rise in temperatures, the virus tends to recede. This is why we are seeing fewer cases now. Cases would have come down in February, but we continued to see cases due to the unseasonal rain."
Health officials said that the arrangements for swine flu, including treatment and diagnostic facilities, will be kept functional till the cases subside completely. "Isolation wards are ordinarily closed from April-May, but this time they will be kept open. Doctors are expected to continue treatment guidelines of category A, B and C patients," an official said.