Most people who get the flu will recover in a few days to less than two weeks. The CDC reports that people with the flu are most contagious during the first three days of their illness. Subclade K is a variant of the H3N2 virus, which is a subtype of influenza A. Influenza A(H3N2) viruses are the most frequently reported flu viruses this season.
However, it is still not too late to get a flu shot, which, according to the doctors, can still prevent severe illness even if someone gets infected. Even when vaccines are not an exact match, they still reduce the risk of severe illness, hospitalization, and flu-related complications. Because international travel plays a major role in virus spread, experts expect Subclade K to continue appearing in new locations as the flu season progresses. Some countries have reported that this strain is becoming more common than other circulating flu viruses. Understanding the subclade K flu strain, how it spreads, and what symptoms to watch for can help you take the right precautions.
New strain of flu hitting US: What are the symptoms?
Japan also witnessed an early start, as the levels of H3N2 flu are now plateauing and may soon start to drop. Doctors say it causes extremely high fever, along with signs of a cold and flu. But they are different enough to evade some of the protection from this year’s vaccine. Subclade K’s mutations are not enough of a change to be considered an entirely new kind of flu. That includes at least eight child deaths and is based on data as of Dec. 20, before major holiday gatherings.
- Most flu cases can be managed at home, but some symptoms require medical attention.
- “There are three strains going around and probably a few more. So you can still be protected from the future,” he said.
- The mutated strain, known as subclade K, originates from the most common flu-causing virus, influenza A, and one of its most common variations, H3N2.
- To start, experts strongly recommend receiving a flu shot, as it is the most effective way to prevent serious illness from the flu.
- Some people, like young children and those with weakened immune systems, may be contagious for longer, however.
Keeping Your Health & Time in Mind.
When doctors describe Subclade K as severe, they are not suggesting it is a completely new or unknown virus. This global pattern is one reason public health officials are taking the variant seriously. Early data suggests this variant has accumulated mutations that may help it spread more easily or partially evade existing immunity. When these changes add up, they can create a new subclade that behaves differently from earlier strains. A flu virus infection of the respiratory tract can trigger an extreme inflammatory response in the body, leading to sepsis. Pneumonia is a serious complication resulting from either flu virus infection alone or the co-infection of flu virus and bacteria, according to the CDC.
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It’s also important to wash them before and after eating, before and after handling food, after using the bathroom and after being around sick people or touching surfaces that could be contaminated. This applies to all the ailments above and others that often circulate during the wintertime, like respiratory syncytial virus, or RSV. As of Dec. 30, CDC projections found that flu infections are on the rise in 17 states, unchanged or not reported in seven states and declining or likely declining in 24. Some people, like young children and those with weakened immune systems, may be contagious for longer, however. According to the CDC, the warning signs are different in children and adults.
How many flu cases were reported nationwide?
Because it is structurally different, subclade K may also be better at dodging immune systems that have already built up protections against more familiar strains. A new mutation, called subclade K, continues to drive the spread, with some experts warning that it could supercharge the season. Hospitalizations increased a whopping 48% week-over-week, amounting to 120,000 hospitalizations and 5,000 deaths so far this season.
CDC data through Dec. 27 showed that just under 33% (23,350) of the 70,757 flu tests administered that week were reported positive to the National Respiratory and Enteric Virus Surveillance System. Flu cases have skyrocketed since December began, according to CDC data, and flu activity is now categorized as “high” nationwide. Flu can be detected in infected persons at least one day before symptoms begin, and up to seven days after, but those with flu are most contagious around three days into their infection, according to the CDC. “Vaccinations remain the most effective tool to prevent severe illness from flu, COVID-19 and RSV.”
What are the latest flu symptoms?
Flu season typically peaks mid-to-late winter, from around December through February. Flu season typically starts around late September or early October, when the weather begins to cool down, and usually lasts until the following summer, in May. Your eligibility for YouTube Recap depends on several requirements regarding your account activity and settings.
How to Protect Yourself This Flu Season
There are no rules about when you can or can’t get a vaccine, but professionals typically recommend getting your shot in September or October. “The flu reporting year uses standard reporting weeks outlined by the Centers for Disease Control and Prevention (CDC), where every year has 52 or 53 reporting weeks. It can last from a few days to two weeks, according to the Cleveland Clinic. According to the CDC’s FluView Interactive Map, which monitors visits for respiratory illness with fever plus a cough or sore throat, Florida is seeing low activity. H3N2 symptoms include fever, chills, body aches, headache, extreme fatigue, congestion or runny nose, and coughing.
Loafman and Mora agreed, saying while this season’s flu vaccine was not formulated specifically for the new variant, it will still help prevent against more severe illness. “Children with flu do often have GI symptoms – nausea, vomiting – adults less often, but we are seeing anecdotally more signs of some GI illness for the adults who have the subclade K strain of flu,” Loafman said, adding that he “wouldn’t exclude flu if you have GI symptoms and have the other symptoms like body aches, fever, upper respiratory symptoms.” Peak influenza activity in the U.S. is usually between December and February with some viruses active through early spring, per the CDC. It is a mutated strain of influenza A H3N2, which has already shown resistance to current vaccines, health officials say.
Staying informed and prepared is the most practical response to emerging variants. However, experts continue to stress that flu vaccination remains the best defense. Current vaccines were developed before Subclade K became widespread, which means the match may not be perfect. Beyond complications, the flu can cause chronic medical problems like asthma or chronic heart disease to worsen Young children and people with weakened immune systems may be contagious for longer periods of time. Flu season typically begins around late September or early October, when temperatures start to cool, and usually lasts until the following summer, in May.
The key difference lies in how widely and quickly the virus spreads and how many people become sick at the same time. Many readers wonder if this new flu variant feels different from past flu infections. Some people, especially older adults, may experience more intense fatigue or complications such as pneumonia. Severity here refers more to the potential impact on healthcare systems and vulnerable groups than to dramatically different symptoms in every patient.
“Again, we recommend wearing a mask around anybody who’s vulnerable or if you’re in a crowded place for that first seven days. And, you know, absolutely great hand washing hygiene so you’re not spreading the virus around. And if you can stay in, stay home.” “It’s about five to seven days from the symptom onset before you stop really shedding high levels of the virus. So 10 days is perfect, but it really doesn’t need to be that long,” Loafman said. Flu symptoms typically begin within one to four days of exposure, according to the Cleveland Clinic. In Chicago, residents can get a flu shot by visiting any one of the city’s immunization clinics. “I kept putting it off and I wish I hadn’t because both my parents who I live with right now had the flu shot and didn’t get sick, luckily,” she said.
They stress that this year’s vaccine isn’t totally useless against subclade K and can still prevent serious illness. According to USA TODAY, health officials have expressed concern that the current flu vaccine may not be a perfect match for the new H3N2 mutation. Additionally, 90.5% of the 389 H3N2 viruses sent for further testing during that time were subclade K. The CDC also noted that flu activity was “very high” in the Northeast the week ending Dec. 27, including in New York, Massachusetts and North Carolina.
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- A new strain of influenza has surged across the country during an already busy travel season, with experts worried that low vaccination rates could lead to a significantly brutal flu season.
- Because it is structurally different, subclade K may also be better at dodging immune systems that have already built up protections against more familiar strains.
- H3N2 symptoms include fever, chills, body aches, headache, extreme fatigue, congestion or runny nose, and coughing.
- According to USA TODAY, health officials have expressed concern that the current flu vaccine may not be a perfect match for the new H3N2 mutation.
- Dubbed the “super flu,” the latest influenza strain, Subclade K (A(H3N2), J.2.4.1), is a mutation of the influenza virus.
Influenza season normally peaks in mid-to-late winter, from around December through February. Because it’s structurally distinct, subclade K may also be better at evading immune systems that have already developed protection against more familiar strains. According to the CDC’s FluView Interactive Map, which monitors visits for respiratory illness with fever plus a cough or sore throat, Florida is seeing high activity. Hospitalizations nearly doubled in just one week, climbing to 19,053 from 9,944 the week before, based on CDC data.
How This Fits Into the Bigger Flu and Virus Picture
The subclade K flu strain is a newly identified variant of the influenza A (H3N2) virus. Influenza viruses can be detected in most infected people as soon as one day before symptoms develop and up to five to seven days after becoming sick. CDC data shows flu activity continues to climb across the United States, with most the season’s cases linked to a newer flu strain, subclade K, reports ABC News.
Last week, the Centers for Disease Control and Prevention reported high or very high levels of illness among people, mostly youngsters. Cases of the flu are rising rapidly across the United States, driven by a new variant of the virus, gripping more than half of the states, even as holiday travel plays out. Early antiviral treatment may help shorten illness duration and reduce complications, especially when started within the first two days of symptoms. If you develop flu symptoms, stay home, rest, and contact a healthcare provider if symptoms worsen or if you are in a high-risk group. One of the most common questions is whether the flu vaccine still works against this new flu variant 2026. Children and people with asthma, heart disease, or weakened immune systems are also at higher risk for severe illness.
Dubbed the “super flu,” vegas casino download the latest influenza strain, Subclade K (A(H3N2), J.2.4.1), is a mutation of the influenza virus. Each year, the seasonal flu shot is formulated to target the strains most commonly circulating. A new flu strain that has been dominating cold and flu season overseas has also taken over in the U.S.
Influenza, also known as the flu, is a contagious respiratory illness caused by influenza viruses, according to the Centers for Disease Control and Prevention. Since the flu season began in October, at least 7.5 million people have contracted the illness, USA TODAY reports. The mutated strain, known as subclade K, originates from the most common flu-causing virus, influenza A, and one of its most common variations, H3N2. According to an update Monday, flu activity in the state has climbed to “very high” levels in recent days, the most severe of five categories of respiratory illness activity used by the CDC.
“For most people who need only one dose of influenza vaccine for the season, September and October are generally good times to be vaccinated against influenza,” the CDC says. A new strain of influenza has surged across the country during an already busy travel season, with experts worried that low vaccination rates could lead to a significantly brutal flu season. Although the vaccine is not an exact match, experts say it will still offer protection against the influenza virus. While overall influenza activity across the U.S. remains relatively low, it is increasing among children and young adults, according to the latest report from the Centers for Disease Control and Prevention.