Health and Me

Ishita Roy

Is 2025 The Year Of Flu?

Influenza and other respiratory viruses are surging, note the United Nations. In fact Dr Wenqing Zhang, Unit Head for Global Respiratory Threats at the Department of Epidemic and Pandemic Threats Management of the World Health Organization said that this year is marked by "the emergence and rapid expansion of a new AH3N2 virus subclade". This new variant is called J.2.4.1 or subclade K. This was first reported in August in Australia and New Zealand and has since been detected in over 30 countries. 

Earlier in November, the Public Health Ontario's (PHO) data revealed that Ontario and Canada as a whole could be in a "very tough" flu season this year, thanks to the <span>Influenza A</span> or the flu A. The PHO data revealed a 1.8% rise in influenza cases in the last week of October. Now, amid the influenza A outbreak, 3 children have died from the same in Ottawa and Eastern Ontario region.

US is also facing <span>a flu</span> outbreak and as per the Centers for Disease Control and Prevention (CDC) data, an estimated 2.9 million people have gotten sick so far this season. Among them, 1,200 have also died. This is the 'worst' flu season, point out many experts. For US, the country is seeing a post-Thanksgiving spike in influenza, and saw an 8% increase in people testing positive for the flu.

<span>Super flu</span> or the mutated variant of flu, clade K, has swept the world and caused an early spike in cases worldwide. In Australia, it has caused an early summer spike, while in the UK, it has caused a surge in hospitalization. As per the National Health Service (NHS) England, the number of cases of K flu has been increasing since December 7 and December 11. Hospitalization is up 55% in a week, noted NHS.

Read: <a href="https://www.healthandme.com/health-news/flu-outbreak-close-to-3-million-people-affected-with-1-2k-dead-in-the-us-wheres-the-virus-hitting-hardest-article-153304252" data-type="tilCustomLink">Flu Outbreak: Close To 3 Million People Affected, With 1.2k Dead In the US; Where's the Virus Hitting Hardest</a>

The strain driving the current spike has picked up the nickname “super flu” because it is believed to be a mutated form of influenza A (H3N2), known as “subclade K.”

Influenza H3N2 does not circulate as often as some other flu strains. Dr Simon Clarke, associate professor of cellular microbiology at the University of Reading, explains that the letters “H” and “N” refer to two proteins found on the virus surface, haemagglutinin and neuraminidase. “The numbers simply tell us which versions of those proteins are present,” says Dr Clarke. “It’s a way of grouping strains. This year, H3N2 happens to be the one in the lead.”

“H3 subtypes are relatively uncommon,” he adds. “That means fewer people have built up immunity. There is also evidence they spread more easily and mutate faster, which makes them harder for vaccines to keep up with.

“What we are seeing now is the outcome of that: cases rising sharply earlier than usual, with numbers likely to climb further as winter goes on.”

Recent figures suggest the <a href="https://www.healthandme.com/health-wellness/is-the-flu-shot-effective-against-the-h3n2-super-flu-spreading-this-season-article-153293128" data-type="tilCustomLink">flu vaccine </a> cuts the risk of hospital admission by roughly 30 to 40 per cent in older adults. That protection rate is lower than for some other vaccines, but it is in line with flu vaccine performance in past years. For that reason, advice has not changed. Vaccination remains the single most effective step people can take to protect themselves and to ease pressure on the NHS.

Known as the superfly, this is H3N2 '<a href="https://www.healthandme.com/health-news/a-super-flu-k-strain-is-raising-early-christmas-alarms-heres-what-we-know-article-153294378" data-type="tilCustomLink">subclade K</a>'. It is a type of seasonal influenza A virus and people have not encountered much of it in the recent years. This is why there is less immunity against it. However, the National Health Service (NHS), UK, has already sent out a 'flu jab SOS' to vulnerable people.

NHS has confirmed that the super flu is circulating in England this year, and due to less immunity, it is making it easier to spread across people. The UK Health Security Agency (UKHSA) has urged people to get a flu jab. As per the early data, this year's vaccine has offered good protection despite the new strain.

Daniel Elkeles, chief executive of NHS Providers, said that the major concern is that H3N2 is associated with a more severe illness and superflu could be "a very nasty strain of flu". He said that UK could be experiencing a "tidal wave" of illness.

As per the National Institutes of Health, US, influenza viruses that contains single-stranded RNA that are classified into three types: A, B, and C. Type A and B cause annual epidemics and even pandemics, while type C is a less common disease.

As per the Centers for Disease Control and Prevention (CDC), <a href="https://www.healthandme.com/health-wellness/influenza-a-can-flu-a-kill-you-heres-all-you-should-know-about-flu-article-153298511" data-type="tilCustomLink">Influenza A</a> viruses are descendants of the 2009 H1N1 pandemic virus that emerged in the spring of 2009 and caused a flu pandemic. These viruses, scientifically called the "A(H1N1)pdm09 virus," and more generally called "2009 H1N1," have continued to circulate seasonally since 2009 and have undergone genetic and antigenic changes.

Influenza A(H3N2) viruses also change genetically and antigenically. Influenza A(H3N2) viruses have formed many separate, genetically different clades in recent years that continue to co-circulate.

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2025 year of flu

Flu (Influenza)

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a flu

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Influenza and other respiratory viruses are surging, note the United Nations. In fact Dr Wenqing Zhang, Unit Head for Global Respiratory Threats at the Department of Epidemic and Pandemic Threats Management of the World Health Organization said that this year is marked by "the emergence and rapid expansion of a new AH3N2 virus subclade". This new variant is called J.2.4.1 or subclade K. This was first reported in August in Australia and New Zealand and has since been detected in over 30 countries. 2025 - A Year Of FluEarlier in November, the Public Health Ontario's (PHO) data revealed that Ontario and Canada as a whole could be in a "very tough" flu season this year, thanks to the Influenza A or the flu A. The PHO data revealed a 1.8% rise in influenza cases in the last week of October. Now, amid the influenza A outbreak, 3 children have died from the same in Ottawa and Eastern Ontario region.US is also facing a flu outbreak and as per the Centers for Disease Control and Prevention (CDC) data, an estimated 2.9 million people have gotten sick so far this season. Among them, 1,200 have also died. This is the 'worst' flu season, point out many experts. For US, the country is seeing a post-Thanksgiving spike in influenza, and saw an 8% increase in people testing positive for the flu.Super flu or the mutated variant of flu, clade K, has swept the world and caused an early spike in cases worldwide. In Australia, it has caused an early summer spike, while in the UK, it has caused a surge in hospitalization. As per the National Health Service (NHS) England, the number of cases of K flu has been increasing since December 7 and December 11. Hospitalization is up 55% in a week, noted NHS.Read: Flu Outbreak: Close To 3 Million People Affected, With 1.2k Dead In the US; Where's the Virus Hitting HardestIs Flu Shot Effective?The strain driving the current spike has picked up the nickname “super flu” because it is believed to be a mutated form of influenza A (H3N2), known as “subclade K.”Influenza H3N2 does not circulate as often as some other flu strains. Dr Simon Clarke, associate professor of cellular microbiology at the University of Reading, explains that the letters “H” and “N” refer to two proteins found on the virus surface, haemagglutinin and neuraminidase. “The numbers simply tell us which versions of those proteins are present,” says Dr Clarke. “It’s a way of grouping strains. This year, H3N2 happens to be the one in the lead.”“H3 subtypes are relatively uncommon,” he adds. “That means fewer people have built up immunity. There is also evidence they spread more easily and mutate faster, which makes them harder for vaccines to keep up with.“What we are seeing now is the outcome of that: cases rising sharply earlier than usual, with numbers likely to climb further as winter goes on.”Recent figures suggest the flu vaccine  cuts the risk of hospital admission by roughly 30 to 40 per cent in older adults. That protection rate is lower than for some other vaccines, but it is in line with flu vaccine performance in past years. For that reason, advice has not changed. Vaccination remains the single most effective step people can take to protect themselves and to ease pressure on the NHS.Super Flu or The K StrainKnown as the superfly, this is H3N2 'subclade K'. It is a type of seasonal influenza A virus and people have not encountered much of it in the recent years. This is why there is less immunity against it. However, the National Health Service (NHS), UK, has already sent out a 'flu jab SOS' to vulnerable people.NHS has confirmed that the super flu is circulating in England this year, and due to less immunity, it is making it easier to spread across people. The UK Health Security Agency (UKHSA) has urged people to get a flu jab. As per the early data, this year's vaccine has offered good protection despite the new strain.Daniel Elkeles, chief executive of NHS Providers, said that the major concern is that H3N2 is associated with a more severe illness and superflu could be "a very nasty strain of flu". He said that UK could be experiencing a "tidal wave" of illness.What Is Influenza A?As per the National Institutes of Health, US, influenza viruses that contains single-stranded RNA that are classified into three types: A, B, and C. Type A and B cause annual epidemics and even pandemics, while type C is a less common disease.As per the Centers for Disease Control and Prevention (CDC), Influenza A viruses are descendants of the 2009 H1N1 pandemic virus that emerged in the spring of 2009 and caused a flu pandemic. These viruses, scientifically called the "A(H1N1)pdm09 virus," and more generally called "2009 H1N1," have continued to circulate seasonally since 2009 and have undergone genetic and antigenic changes.Influenza A(H3N2) viruses also change genetically and antigenically. Influenza A(H3N2) viruses have formed many separate, genetically different clades in recent years that continue to co-circulate.