Deaths from pneumonia and influenza across the country rose in the weekly flu report released Friday by the CDC.  It was premature to conclude that any third wave of swine flu was emerging, said the spokesman, Thomas Skinner. Underscoring his point, all the other data in the weekly C.D.C. report, along with New York City hospital admission records and visits to campus health centers tracked by the American College Health Association, found that flu activity was still declining across the country, so the rise in deaths was a mystery.

The weekly report showed that 8.3 percent of all deaths in 122 cities were caused by pneumonia or flu, while the normal midwinter level is about 7.7 percent. That 8.3 percent was slightly