CDC has estimated the burden of flu since 2010. Past year at this time, the proportion of outpatient visits for flu-like illness was 5.8%.
Three preschoolers have died in Saskatchewan as a result of the flu so far this season, according to the provincial health ministry.
Federal health officials say that the flu is now widespread in Alabama - and it's expected to increase.
While states such as California and North Carolina have seen significant numbers of flu-related deaths this season, US health officials said Friday that the nationwide impact of influenza seems to be milder than last winter.
In North Carolina, state health officials said six people died from the flu last week, raising the death toll for the season to 16.
By comparison, there were 195 pediatric hospitalizations over the same period last season.
One death was associated with an influenza A (H3) virus, one death was associated with an influenza A (H1N1) pdm09 virus and one death was associated with an influenza A virus for which no subtyping was performed.
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Statewide, 331 people have been hospitalized due to flu complications, including 38 in Oklahoma County, according to the Oklahoma State Department of Health. In the past, CDC provided these estimates at the end of each flu season.
"If people have not yet had the vaccine, it's not unusual that around this time, after the holidays, we might have a little bit more influenza activity", Murti said.
Quick treatment can save lives, the CDC said.
The CDC recommends flu vaccinations to decrease the risk of contracting the virus and its possibly deadly side effects.
Flu season is not over, and it's not too late to get vaccinated, Fry said.
She and other public-health experts urged Canadians who have not yet been vaccinated to get the shot as soon as possible.