NEW YORK — Sick with the flu? You’ve got a lot of company.

The flu blanketed the U.S. again last week for the third straight week. Only Hawaii has been spared.

Last week, 1 in 15 doctor visits were for symptoms of the flu. That’s the highest level since the swine flu pandemic in 2009. The government doesn’t track every flu case but comes up with estimates; one measure is how many people seek medical care for fever, cough, aches and other flu symptoms.

In Pima County, there were 2,023 confirmed flu cases from Oct. 7 to Jan. 20, according to the Arizona Department of Health Services. The county total represents an increase of more than 1,000 confirmed cases since Dec. 30.

Statewide, there were 16,590 confirmed flu cases during the same period , according to the data.

The Arizona figures reflect an 824 percent increase in flu cases from this time in 2016-2017, said Aaron Pacheco, a Pima County Health Department spokesman.

“Any flu season can change, and when we see a peak, we absolutely hope that we have come through the worst, but there is no easy way to tell until the flu season is over,” said Pacheco.

“Typically in Pima County, influenza cases are confirmed into March, he said. “But last season it was drawn out into the summer.”

“This season the flu hit hard and we have seen a lot of cases in a short period of time, and we are hoping the trend will go downward, but we do not know,” Pacheco said.

He said the flu is still circulating in the county, and families need to protect themselves by washing their hands often, covering a cough, and staying home from school or work if you are sick.

“It is better for the people around you, and it will help you recover faster by staying home and resting,” said Pacheco. He said local hospitals are busy admitting patients with the flu, but have not indicated that personnel are overwhelmed.

“We encourage healthy people with flu-like symptoms to contact their doctor. Emergency rooms should be reserved for folks who are at high risk — those with medical conditions and who are having a hard time breathing,” Pacheco said.

Flu is widespread in every state except Hawaii, with 39 states reporting high traffic to doctors last week, up from 32.

At this rate, by the end of the season somewhere around 34 million Americans will have gotten sick from the flu, the Centers for Disease Control and Prevention said Friday.

Some good news: Hospital stays and deaths from the flu among the elderly so far haven’t been as high as in some other recent flu seasons. However, hospitalization rates for people 50 to 64 — baby boomers, mostly — has been unusually high, CDC officials said in the report, which covers the week ending Jan. 20.

A New York pediatrician said her office has been busy but the kids with the flu haven’t been quite as sick as in the past.

“For most of them, their symptoms are milder,” said Dr. Tiffany Knipe.

This year’s flu shot targets the strains that are making Americans sick, mostly the H3N2 flu virus. But exactly how well it is working won’t be known until next month. It’s the same main bug from last winter, when the flu season wasn’t so bad. It’s not clear why this season — with the same bug — is worse, some experts said.

“That’s the kicker. This virus really doesn’t look that different from what we saw last year,” said Richard Webby, a flu researcher at St. Jude Children’s Research Hospital in Memphis.

It may be that many of the people getting sick this year managed to avoid infection last year. Or there may be some change in the virus that hasn’t been detected yet, said the CDC’s Dr. Dan Jernigan, in a call with reporters Friday.

Based on patterns from past seasons, it’s likely the flu season will start to wane soon, experts say. There are some places, like California, where the season already seems to be easing, CDC officials said.

“If I was a betting man, I’d put money on it going down,” Webby said. “But I’ve lost money on bets before.”

The season usually peaks in February, but this season started early and took off in December.

Flu is a contagious respiratory illness. It can cause a miserable but relatively mild illness in many people, but more severe illness in others. Young children and the elderly are at greatest risk from flu and its complications. In a bad season, there are as many as 56,000 deaths connected to the flu.

In the U.S., annual flu shots are recommended for everyone age 6 months or older. Last season, about 47 percent of Americans got vaccinated, according to CDC figures.

Jennifer Manton didn’t get a flu shot and got sick about two weeks ago, hit by high fever and body aches. She missed two days of work at a New York law firm, and felt bad for about 10 days.

“I had not had the flu since 1996,” said the 48-year-old Manton. “It’s been 22 years since I felt that badly.”

Star reporter Carmen Duarte and AP reporter Julie Walker contributed to this report.