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Swine flu resurfaces in Utah, but many people are immune
This is an archived article that was published on sltrib.com in 2013, and information in the article may be outdated. It is provided only for personal research purposes and may not be reprinted.

This year's flu season is shaping up to look a lot like last year's — with one exception.

The strain circulating is H1N1, or swine flu, which hit states fast and hard in 2009.

"The past few seasons have been mostly AH3," said Rachelle Bolton, an epidemiologist at the Utah Department of Health, noting that "It's typical to see strains move around a little, which is why we include several strains in the vaccine."

Swine flu shook the public health world in part because, when it surfaced, it behaved differently than other strains. Instead of seeing hospitalizations mostly among the young and old, healthy adults between ages 25 and 49 proved especially vulnerable, said Bolton.

This year, 43 percent of the season's 44 hospitalizations are among this age group, according to Utah's latest influenza report.

So far this year H1N1 isn't making quite the same splash, however.

Flu activity started about a month early this year, in November, but it is now closely tracking last year's rate, which was higher than average but not as high as in 2009, said Bolton. "There is a level of communitywide immunity to [H1N1]. In 2009, no one had encountered it before so pretty much everyone was susceptible."

This year's vaccine covers swine flu along with other common strains.

It's not too late to get immunized, and there's ample supply of the vaccine, but the sooner the better, say health officials, stressing it takes two weeks to develop full immunity.

Area hospitals, including Intermountain Healthcare facilities, have put visitor restrictions in place to reduce exposure for vulnerable patients.

This includes barring child visitors, those under age 14, to newborn intensive-care units, said Jess Gomez, a spokesman at Intermountain Medical Center.

"We're asking people to take precautions and use common sense," he said. "Wash your hands and if you're sick, don't come. And if you think you might be getting sick, use a mask."

Unlike many viral respiratory infections, such as the common cold, the flu can cause severe illness and life-threatening complications, according to the U.S. Centers for Disease Control and Prevention (CDC).

Each year 5 percent to 20 percent of the population gets the flu and more than 200,000 are hospitalized. It is a leading cause of death, killing between 3,000 and 49,000 people annually, estimates the CDC.

Last year five children in Utah died from the flu, more than usual, said Bolton. "We usually see between one and three deaths a year."

kstewart@sltrib.com

Twitter: @KStewart4Trib

Public health • Flu rates on track to match last year, and officials urge vaccination.
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