Health and Me

Ishita Roy

Flu Season Is Only Starting, and Doctors Urge Patients to Stay On High Alert

The <span>flu</span> season has started earlier than expected in some parts of the country. The cases may erupt as soon as people start to travel, meet more people during the Thanksgiving and other upcoming holidays. However, there have been warning signs of a virus that has already set off massive outbreaks in UK and Canada, called the H3N2 subclade K. 

<h2>What Is The Flu Strain Subclade K?</h2>

It is a variant of the H3N2 virus that had been circulating in other countries over the summers. Experts say the new variant is driving a surge in flu cases across Canada, Japan, and the U.K. Data from the Centers for Disease Control and Prevention shows that of nearly 150 test samples identified as part of the H3 lineage, more than half belonged to the subclade K group. 

The influx of patients have been high too, as Dr Cameron Wolfe, a disease specialist at Duke University School of Medicine in Durham, North Carolina suggest, and is reported by the NBC. "At the moment, we’ve had two, three, four per day coming in," he said. 

Alicia Budd, who leads the Centers for Disease Control and Prevention’s domestic influenza surveillance team, said flu activity in the United States is expected to rise steadily in the coming weeks.

<h2>How Dangerous Is The New H3N2 Flu Strain?</h2>

So far, most of the flu circulating this season is the H3N2 strain, which historically causes more hospitalizations and deaths among older adults. An early spike in cases, experts say, can heighten risks for this age group. Wolfe noted that when flu season begins unusually early, some nursing homes may still be rolling out vaccinations and some hospitals may not have fully vaccinated their staff. As a result, communities may be less protected than they typically would be if the virus peaked later in the winter.

Overall flu activity remains low, but the CDC’s latest report shows cases climbing. The agency estimates that at least 650,000 people have had the flu so far this season, with around 7,400 hospitalized and 300 deaths reported.

Budd said most of the rise in cases and emergency room visits is occurring in children. Last year, 280 children in the United States died from the flu, marking the deadliest pediatric flu season ever recorded outside the 2009 to 2010 H1N1 pandemic. No pediatric deaths have been reported yet this season, though doctors remain concerned after last winter’s rapid spread of the virus through schools, day care centers and hospitals.

“It feels like the calm before the storm,” said Dr. Buddy Creech, a pediatric infectious disease specialist at Vanderbilt University Medical Center. “We may have a difficult influenza year.”

H3N2 is known for mutating easily, and a new version of the strain, known as subclade K, appeared over the summer with several mutations. It emerged after this season’s flu shot formula had already been finalized and has already driven significant outbreaks in Canada and the United Kingdom.

Budd said the CDC is studying how well the current vaccine matches this evolving strain, but she urged people to get vaccinated regardless. Even when the circulating strain is not a perfect match, she said, the shot still helps reduce the severity of illness.

Doctors across the country are watching the latest trends closely. “Does it turn on our antenna a little bit more? Yes,” said Dr. Daniel Varga, chief physician executive at Hackensack Meridian Health in New Jersey. “It makes us even more vigilant about the monitoring we do locally.”

Dr. Melanie Kitagawa, medical director of the pediatric intensive care unit at Texas Children’s Hospital in Houston, stressed that it is not too late to get vaccinated. She said the more people who receive the flu shot before flu activity accelerates, the better protected communities will be.

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The flu season has started earlier than expected in some parts of the country. The cases may erupt as soon as people start to travel, meet more people during the Thanksgiving and other upcoming holidays. However, there have been warning signs of a virus that has already set off massive outbreaks in UK and Canada, called the H3N2 subclade K. What Is The Flu Strain Subclade K?It is a variant of the H3N2 virus that had been circulating in other countries over the summers. Experts say the new variant is driving a surge in flu cases across Canada, Japan, and the U.K. Data from the Centers for Disease Control and Prevention shows that of nearly 150 test samples identified as part of the H3 lineage, more than half belonged to the subclade K group. The influx of patients have been high too, as Dr Cameron Wolfe, a disease specialist at Duke University School of Medicine in Durham, North Carolina suggest, and is reported by the NBC. "At the moment, we’ve had two, three, four per day coming in," he said. Alicia Budd, who leads the Centers for Disease Control and Prevention’s domestic influenza surveillance team, said flu activity in the United States is expected to rise steadily in the coming weeks.How Dangerous Is The New H3N2 Flu Strain?So far, most of the flu circulating this season is the H3N2 strain, which historically causes more hospitalizations and deaths among older adults. An early spike in cases, experts say, can heighten risks for this age group. Wolfe noted that when flu season begins unusually early, some nursing homes may still be rolling out vaccinations and some hospitals may not have fully vaccinated their staff. As a result, communities may be less protected than they typically would be if the virus peaked later in the winter.Overall flu activity remains low, but the CDC’s latest report shows cases climbing. The agency estimates that at least 650,000 people have had the flu so far this season, with around 7,400 hospitalized and 300 deaths reported.Budd said most of the rise in cases and emergency room visits is occurring in children. Last year, 280 children in the United States died from the flu, marking the deadliest pediatric flu season ever recorded outside the 2009 to 2010 H1N1 pandemic. No pediatric deaths have been reported yet this season, though doctors remain concerned after last winter’s rapid spread of the virus through schools, day care centers and hospitals.“It feels like the calm before the storm,” said Dr. Buddy Creech, a pediatric infectious disease specialist at Vanderbilt University Medical Center. “We may have a difficult influenza year.”H3N2 is known for mutating easily, and a new version of the strain, known as subclade K, appeared over the summer with several mutations. It emerged after this season’s flu shot formula had already been finalized and has already driven significant outbreaks in Canada and the United Kingdom.Budd said the CDC is studying how well the current vaccine matches this evolving strain, but she urged people to get vaccinated regardless. Even when the circulating strain is not a perfect match, she said, the shot still helps reduce the severity of illness.Doctors across the country are watching the latest trends closely. “Does it turn on our antenna a little bit more? Yes,” said Dr. Daniel Varga, chief physician executive at Hackensack Meridian Health in New Jersey. “It makes us even more vigilant about the monitoring we do locally.”Dr. Melanie Kitagawa, medical director of the pediatric intensive care unit at Texas Children’s Hospital in Houston, stressed that it is not too late to get vaccinated. She said the more people who receive the flu shot before flu activity accelerates, the better protected communities will be.