That strain has been circulating and was pandemic in 2009 and in 1918.
The early start to the flu season was partly to blame for filling emergency rooms with flu-infected people, the Public Health Agency of Canada has said.
Officials recommend a flu vaccine for all individuals six months of age and older.
Since Sept. 30, more than 2,300 positive influenza tests have been reported to the Arkansas Department of Health online database by health care providers. "But it's odd that in the Southeast, the H3N2 virus is more common".
Arkansas recorded 227 deaths last flu season, which was the most on record for the past three decades. When that strain predominated, almost 1 million Americans were hospitalized and 80,000 died.
So far, the bulk of the cases in Calgary have been of the H1N1 strain, rather than the H3N2 strain that was prolific previous year, he said.
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Flu season has officially begun. "It does take two weeks for it to become fully effective, that is, for our immune system to have a full response", Rock says.
The best way to protect yourself and those around you is to get a flu shot, and there's still plenty of time to get vaccinated, Brammer said. A total of 12 children had died from the flu at the end of week 51 a year ago. They are still encouraging people to get their flu shots.
People who are elderly, young and those who already have underlying conditions are most at-risk of contractingt he highly-contagious virus.
Dr. William Schaffner, who studies the flu, says that's not unusual; when flu kills a child, it often happens quickly.
Stay home when you are sick.
Peak flu season in the state is between now and March. So there's still a long way to go, she said.
Although the flu is not something most healthy Americans go around worrying about, the Centers for Disease Control and Prevention (CDC) is warning that this year's flu season could be a brutal one.