The flu virus is hanging on in the U.S., intensifying in some areas of the country after weeks of an apparent national decline.
Centers for Disease Control and Prevention data released Friday showed a continued national drop in flu hospitalizations, but other indicators were up — including the number of states with high or very high levels for respiratory illnesses.
“Nationally, we can say we’ve peaked, but on a regional level it varies,” said the CDC’s Alicia Budd. “A couple of regions haven’t peaked yet.”
Flu-like illnesses seem to be proliferating in the Midwest, and last week were at high levels in 23 states — up from 18 the week before, CDC officials said.
Flu generally peaks in the U.S. between December and February. National data suggests this season’s peak came around late December, but a second surge is always possible. That’s happened in other flu seasons, with the second peak often — but not always — lower than the first, Budd said.
