Flu shot: What we know about this year’s vaccine and ‘virulent’ dominant strain
The flu shot can be especially beneficial this season, they say, as this year’s vaccine contains protection against the strain of flu proving most dominant, which is not always the case.
The vast majority of flu cases detected and lab tested this year so far have been caused by a strain of the influenza A virus known as H3N2. A very small percentage – just three per cent to date – were the influenza A strain known as H1N1, according to FluWatch data released weekly by PHAC. That the most dominant strain circulating this year is included in this year’s flu vaccine is both good news and bad news for Canadians this flu season, says Matthew Miller, director of the Michael G. DeGroote Institute for Infectious Disease Research at McMaster University.
That’s why Sinha is urging all Canadians to get their flu shot this year – to protect not only themselves, but also those most likely to experience complications and death.
Among flu detections for which age information was available last week, 56 per cent of cases were among individuals aged 0-19 years old, the PHAC data shows.Dr. Donald Vinh, an infectious disease specialist and medical microbiologist at the McGill University Health Center in Montreal, says it is surprising to see high numbers of lab-confirmed flu cases among children and youth, because lab testing for influenza is done mainly in hospitals upon admission.
Given that flu has arrived earlier than usual this year and also that cases of respiratory syncytial virus and COVID-19 are also circulating and infecting large numbers of children, the case has never been stronger for all Canadians to get their flu vaccine, Vinh said.“I’m concerned about this flu season, not exclusively because of the flu, but because of this of these respiratory viruses,” he said.
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