Canada Flu activity in Canada 'high' and continuing to rise, latest public health numbers say

12:05  13 january  2018
12:05  13 january  2018 Source:   cbc.ca

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The number of people stricken by flu continues to rise across the country, with 15,572 laboratory-confirmed cases for the season as of Jan. 6, the Public Health Agency of Canada says .

Flu activity in Canada ' high ' and continuing to rise , latest public health numbers say . Strang says in the last two to three weeks, there has been a steady increase in the number of people going to hospital with flu -like symptoms.

Flu activity in Canada 'high' and continuing to rise, latest public health numbers say© Chanss Lagaden/CBC Flu activity in Canada 'high' and continuing to rise, latest public health numbers say

The number of people stricken by flu continues to rise across the country, with 15,572 laboratory-confirmed cases for the season as of Jan. 6, the Public Health Agency of Canada says.

The level of influenza activity is "in the higher range of expected levels for this time of year," the agency said in its latest FluWatch report, released Friday.

Last year, there were far fewer cases, with 8,976 reported by the end of the first week of January 2017.

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The majority of cases continue to be the H3N2 subtype of Influenza A, a particularly brutal strain that tends to cause more severe illness, particularly among the elderly and children.

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Flu activity in Canada ' high ' and continuing to rise , latest public health numbers say . To conduct the study, researchers looked at almost 20,000 adult cases of laboratory-confirmed influenza infection from 2009 to 2014 and identified 332 patients who were hospitalized for a heart attack within one year

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At the same time, Influenza B is "increasingly steadily," the report says, with 20 times more detections so far this season than for the same time period in the last seven years.  The B strain started circulating much earlier than usual, the public health agency said.

The flu is affecting people over 65 years of age the most and there have been 54 reported flu deaths in Canada this season, the FluWatch report said. Fewer than five of those deaths were children.

There have been 1,850 reported hospitalizations — 68 per cent of which have been seniors.

Bad flu season in U.S.

The U.S. is also experiencing a bad flu season, with the virus now widespread in every state except Hawaii, The Associated Press reported.

But in an update on Friday, the Centers for Disease Control and Prevention said patient traffic for flu at U.S. hospitals was no longer skyrocketing the way it was in December.

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Public Health England's Richard Pebody said the fact flu rates had stabilised was a good sign and suggested " flu activity is starting to peak". The weekly reports released on Thursday also showed high rates of the vomiting bug norovirus.

CBC NEWS: Flu activity in Canada ' high ' and continuing to rise , latest public health numbers say . She's optimistic progress is being made by a number of teams around the world who are working toward achieving that goal.

"It looks like it's starting to level out," said the CDC's Lynnette Brammer, who oversees flu tracking.

But flu is unpredictable, she added. "I don't know where it will end up."

Vaccine effectiveness

H3N2, which is the dominant flu in both Canada and the U.S., is prone to mutation, which can make the vaccine against it less effective — even though it appears the virus strain was correctly predicted. Experts, including Canada's chief public health officer, have said that, although it's too early to tell for sure, the H3N2 component of this year's vaccine may have mutated during the manufacturing process, making it less effective.

Countries in the Southern Hemisphere, which have their flu season before Northern Hemisphere countries, experienced poor vaccine effectiveness against H3N2, leading health-care workers to anticipate similar results in Canada.

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    This flu season is “possibly tracking to be more severe than the 2014-2015 season, which was characterized as moderately severe,” Brad Hutton, the deputy commissioner of public health at the state Department of Health , said .

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Despite that, health-care workers say it's still important for Canadians to get their flu shot — partly, they say, because some protection against H3N2 is better than none. In addition, they say the vaccine could offer good protection against other flu strains in circulation, including Influenza B.

Doctors also say research suggests that even if the vaccine doesn't prevent someone from getting the flu, it could help lessen the symptoms.

"Even though it's not perfect, it's still the best protection we have," said Dr. Isaac Bogoch, an infectious disease specialist at University Health Network in Toronto.

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