Get your flu shots, health officials urge amid concerns about bad season

It's flu shot time, and health officials are bracingfor a potentially miserable fall and winter.

The Southern Hemisphere, especially Australia, was hit hard over the past few months with a flu strain that's notorious for causing severe illness, especially in seniors.

And in the U.S., small clusters of thatH3N2 flu already are popping up.

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"We don't know what's going to happen but there's a chance we could have a season similar to Australia," Dr. Daniel Jernigan, influenza chief at the U.S. Centers for Disease Control and Prevention, told The Associated Press.

The worrisome news came as the government urged Americans Thursday to make sure they get a flu shot before influenza starts spreading widely. Health and Human Services Secretary Tom Price got his own jab to publicize the importance, saying, "There's no reason not to get protected."

The CDC's Jernigan cautioned there's no good way to predict how bad the upcoming flu season will be. An H3N2 strain caused infections in Canada and the U.S. last year, too.

H3N2called 'bad actor'

Sometimes watching what happensin the Southern Hemisphere is a good predictor of what to expect in the Northern Hemisphere and sometimes it isn't, said Dr. Michelle Murti,a public health physician at Public Health Ontariowho conducts influenzasurveillance.

"I think it's an important signal and something we need to be aware of," Murti said in an interview Friday.

"The message that I think we would want to be taking from thatis a reminder that flu season is quite severe."

H3N2 is "the bad actor," said Dr. William Schaffner of Vanderbilt University and the National Foundation for Infectious Diseases. "If you needed another reason to get vaccinated, there it is. Best get that protection."

Murti said that typically H3N2can be moresevere than other strains among those over age 65 who are at higher risk of complications. In Canada, there tend to be more outbreaks in long-term care facilities when H3N2is the predominant strain.

World Health Organization flu advisers meeting in Australia recommended updating future vaccines for the Southern Hemisphere to strengthen H3N2 protection.

Flu does constantly evolve, forcing new vaccines to be brewed each year to match the strains specialists expect to cause most illness. In the U.S., CDC's Jernigan said this year's shots aren't perfect but that the H3N2 strain travelling around the globe hasn'tsignificantly changed, so the vaccine remains a pretty good match.

"It's the best tool we have right now for preventing disease," he said in an interview.

Flu season begins in Canada

The Public Health Agency of Canada's first Fluwatchreport of the 2017-18 season says flu activity remains at inter-seasonal levels across the country, with a few regions reporting sporadic or localized activity.The majority of influenza A virussubtypes were A(H3N2).

"The 2017-18 flu vaccines available in Canada this year contain the same components as those recommended by the World Health Organization for the Northern Hemisphere," a spokespersonfor the Public Health Agency of Canada said in an email.

Across Canada, Murti said flu vaccines are now beingshipped to distributors. Most provinces and territories start their annual flu vaccine campaigns towardthe end of October.

Murti recommended those at high risk of influenzacomplications get vaccinated. This includes:

• The elderly.
• Children under age five.
• Pregnant women.
• People with underlying conditions such as asthma, respiratory or cardiovascular disease.

Those who live or work with any of the above should alsobe vaccinated.

The effectiveness of influenza vaccines varies from year to year, ranging from 40 per cent to 60 per cent,Murti said

To prevent flu, public health officials also recommend:

• Wash your hands frequently, especially after touching your face, the face of your child or having contact with any other person who is ill.
• Stay home when sick, and keep sick children at home, as much as possible.
• Cover your cough by using a tissue, your sleeve or elbow, and avoid coughing into your hands.
• For symptoms that include fever, cough, fatigue, head and body achesor a runny nose,stay home and rest in bed.

The start of Canada's flu season tends to peak anywhere between November and January, Murti said.