The latest Center for Disease Control report lists flu activity in 30 states so far.
About 6 million to 7 million Americans have become ill since flu season kicked off in the fall.
Officials from the New York State Health Department announced this week that the flu is spreading rapidly throughout the state, with some hospitals reportedly limiting visitation to prevent the spread of the virus.
In Arizona, there have been 4,510 confirmed cases of influenza this season compared to 16,144 previous year at this time, and the flu is widespread throughout the state.
By comparison, there were 195 pediatric hospitalizations over the same period last season.
Half those people have been to the doctor because of flu, it says. The CDC counts the death of every child from influenza.
As many as 83,500 people have been hospitalized because of flu, federal health officials say.
If the current strain continues to be the predominant virus, it is what the head of the epidemiology and prevention branch of CDC's flu division expects.
There were three influenza-related pediatric deaths reported for the week ending January 5, bringing the 2018-2019 flu season total to 16 - a sharp drop from a year ago when seven deaths were reported for the comparable week, and there had already been 20 deaths during the 2017-2018 flu season.
The CDC said that reported cases tend to increase in November before peaking between December and February.
Flu season is not over, and it's not too late to get vaccinated, Fry said. "These new in-season estimates fill out the picture of the burden of flu in the United States", the CDC said in a statement. People who are very sick or who are at high risk of serious flu complications and get flu symptoms should see a health care provider early in their illness for possible treatment with a flu antiviral drug.