The 2025 flu season is proving to be more challenging than many expected. As we move through December, health officials across the United States are watching closely as influenza cases continue to rise nationwide. If you have been feeling under the weather lately or want to protect yourself and your family, understanding what is happening with the flu this season is more important than ever.
The Centers for Disease Control and Prevention has confirmed that seasonal influenza activity is increasing in most areas of the country. What makes this year different is the emergence of a new flu variant that has health experts concerned. But don’t worry. By the end of this article, you will understand everything you need to know about influenza, how to recognize flu symptoms, and most importantly, how to protect yourself.
What Is Influenza and Why Should You Care
Influenza, commonly known as the flu, is a respiratory illness caused by influenza viruses that infect your nose, throat, and sometimes your lungs. While many people think of the flu as just a bad cold, it can actually be much more serious. The flu is different from a regular cold because it comes on suddenly and tends to make you feel much worse overall.
When you catch influenza, the virus attacks your respiratory system and causes inflammation throughout your body. This is why you often feel achy all over and extremely tired when you have the flu. Your body is working hard to fight off the infection, which uses up a lot of your energy.
The flu spreads easily from person to person, mainly through tiny droplets that come out when someone with the flu coughs, sneezes, or even talks. You can also catch the flu by touching a surface that has the virus on it and then touching your mouth, nose, or eyes. This is why good hand washing is so important during flu season.
The New Flu Variant Making Headlines in 2025
This year, health officials have identified a new influenza variant called subclade K. This variant is a mutated form of the influenza A strain H3N2, and it is causing concern among medical experts because it is driving up cases and hospitalizations across the United States and other countries worldwide.
According to recent data from the CDC, about 89 percent of flu viruses tested since late September belong to this subclade K variant. This new variant has undergone what scientists call antigenic drift, which means the virus has changed slightly from the version that was used to create this year’s flu vaccine.
Dr. Andrew Pekosz from Johns Hopkins Bloomberg School of Public Health explained that right now, subclade K is being found everywhere that influenza is detected in the United States. The variant has already caused severe flu seasons in the United Kingdom, Canada, Japan, and Australia, and now it is making its way through American communities.
What makes subclade K particularly concerning is that the mutations in this variant may allow it to partially evade the protection provided by this year’s flu vaccine. However, experts are quick to point out that getting vaccinated is still extremely important and beneficial.
Recognizing Flu Symptoms in 2025
Knowing how to recognize flu symptoms early can help you take action quickly and prevent spreading the virus to others. The flu typically comes on suddenly, unlike a cold which develops gradually over several days.
Common flu symptoms include a high fever that can reach 100 to 104 degrees Fahrenheit or even higher in some cases. You might also experience severe body aches that make it uncomfortable to move around. Many people describe feeling like they have been hit by a truck when they have the flu.
A persistent dry cough is another hallmark sign of influenza. This cough can be quite bothersome and may last for several weeks even after other symptoms improve. You might also experience a sore throat, though this symptom is more common with colds than with the flu.
Extreme tiredness and weakness are very common with influenza. You might feel so exhausted that getting out of bed feels like a major effort. Headaches are also frequent, along with chills and sweating. Some people, especially children, may experience nausea, vomiting, and diarrhea, though these symptoms are less common in adults.
If you experience difficulty breathing, chest pain, sudden dizziness, confusion, severe vomiting, or flu symptoms that improve but then return with fever and worse cough, you should seek medical attention immediately. These could be signs of serious complications.
How Serious Is the Current Flu Season
The CDC has reported that as of early December 2025, there have been at least 2.9 million flu illnesses, 30,000 hospitalizations, and 1,200 deaths from influenza so far this season. While these numbers might sound alarming, it is important to understand that flu season is just starting, and activity typically does not peak until February.
The cumulative hospitalization rate is currently at nearly seven cases per 100,000 population. This is the third highest cumulative rate at this point in the season since 2010, following only the 2022-23 and 2023-24 seasons. Texas has seen a particularly sharp increase in hospitalizations, especially among people aged 65 and older.
In Texas specifically, the number of hospital and clinic visits related to flu has passed 5,000 weekly cases for three consecutive weeks in late November and early December. This is more than double the number of cases reported during the same time last year. For people aged 65 and older in Texas, hospitalization rates jumped from 2.2 per 100,000 in early November to 7.4 per 100,000 by early December.
Sadly, the first influenza-associated pediatric death of the 2025-2026 season was reported by the CDC in early December. This death occurred in late November and was associated with an influenza A virus. This tragic reminder shows that influenza can be serious for people of all ages.
Understanding the Flu Vaccine and Subclade K
One of the biggest questions people have this year is whether they should still get the flu vaccine given that subclade K has drifted from the vaccine strain. The answer from health experts is a resounding yes.
While the mutations in subclade K may reduce the vaccine’s effectiveness somewhat, the flu shot still provides important benefits. The vaccine continues to offer protection against severe influenza illness, hospitalization, and death. It also protects against other circulating influenza viruses that are represented in the vaccine formulation.
Early estimates from England show that the 2025-26 influenza vaccine effectiveness against influenza-associated hospitalization remained within expected ranges of 70 to 75 percent for children and 30 to 40 percent for adults. This suggests that influenza vaccination remains an effective tool in preventing influenza-related hospitalizations this season.
Additionally, getting vaccinated helps reduce the overall community spread of influenza. Even if the vaccine does not prevent you from getting infected, it can make your illness less severe and help you recover faster. For people at higher risk of complications from flu, including older adults, young children, pregnant women, and people with certain chronic health conditions, the vaccine is especially important.
More than 127 million doses of influenza vaccine have been distributed in the United States this season. Health officials emphasize that it is not too late to get vaccinated, even if we are already several weeks into flu season. It takes about two weeks after vaccination for your body to develop full protection.
Who Is Most at Risk from Influenza
While influenza can affect anyone, certain groups of people are at higher risk of developing serious complications from the flu. Understanding if you or your loved ones fall into these high-risk categories can help you take extra precautions.
Older adults aged 65 and above are at significantly higher risk. In the current season, adults 65 and older have the highest hospitalization rate at 19.6 per 100,000 population. As we age, our immune systems naturally become weaker, making it harder for our bodies to fight off infections like influenza.
Young children, especially those under age five and particularly those younger than two years old, are also at increased risk. Their immune systems are still developing, which makes them more vulnerable to severe illness. The current season has seen a hospitalization rate of 9.7 per 100,000 for children aged zero to four years.
Pregnant women face increased risks from influenza because pregnancy changes the immune system, heart, and lungs in ways that make severe illness more likely. Getting vaccinated during pregnancy protects both the mother and the baby for several months after birth.
People with chronic medical conditions such as asthma, diabetes, heart disease, or weakened immune systems are also at higher risk. These underlying conditions can make it harder for the body to fight off the flu virus and can lead to complications.
When examining rates by race and ethnicity, the highest hospitalization rate per 100,000 population has been among non-Hispanic Black persons at 12.8, followed by American Indian or Alaska Native persons at 8.0, Hispanic persons at 7.2, non-Hispanic White persons at 5.4, and Asian and Pacific Islander persons at 3.4.
How to Protect Yourself and Your Family from the Flu
Protection against influenza starts with getting your annual flu vaccine. The CDC recommends that everyone six months and older who has not yet been vaccinated this season should get an annual influenza vaccine. Even though we are already into the flu season, getting vaccinated now can still provide valuable protection during the months ahead.
Beyond vaccination, there are several everyday preventive actions you can take to reduce your risk of getting and spreading the flu. Washing your hands frequently with soap and water for at least 20 seconds is one of the most effective ways to prevent illness. If soap and water are not available, use an alcohol-based hand sanitizer.
Try to avoid close contact with people who are sick, and if you are sick, stay home from work or school to avoid spreading the virus to others. Cover your nose and mouth with a tissue when you cough or sneeze, and throw the tissue in the trash immediately afterward.
Avoid touching your eyes, nose, and mouth, as germs spread easily this way. Clean and disinfect frequently touched surfaces and objects, especially during flu season. Getting enough sleep, managing stress, drinking plenty of fluids, eating nutritious foods, and staying physically active can all help keep your immune system strong.
Similar to how people monitor other health concerns, such as keeping track of how is Gloria Copeland health, being proactive about your own health and the health of your family members is essential during flu season.
Treatment Options for Influenza
If you do get sick with the flu, there are prescription antiviral medications that can treat flu illness. These medications work best when started within the first 48 hours of symptom onset, so it is important to see a healthcare provider as soon as possible if you think you have the flu.
Antiviral drugs like oseltamivir, zanamivir, and peramivir can help shorten the duration of your illness and make symptoms less severe. They are especially important for people at higher risk of developing serious flu-related complications. These medications work by stopping the flu virus from multiplying in your body.
According to CDC testing, all influenza viruses tested this season have shown susceptibility to these antiviral medications. No highly resistant strains have been detected so far, which is good news for treatment options.
In addition to prescription medications, there are several things you can do at home to feel better while recovering from the flu. Getting plenty of rest allows your body to focus its energy on fighting the infection. Drinking lots of fluids helps prevent dehydration and can help loosen congestion.
Over-the-counter pain relievers can help reduce fever and ease body aches, but always follow the dosing instructions carefully. Using a humidifier can help ease congestion and coughing. Warm liquids like tea, broth, or soup can be soothing for a sore throat and help keep you hydrated.
The Difference Between Flu and Other Respiratory Illnesses
During the current respiratory illness season, influenza viruses are among several viruses contributing to respiratory disease activity. COVID-19 and respiratory syncytial virus, commonly known as RSV, are also circulating and causing illness.
Distinguishing between these illnesses based on symptoms alone can be difficult because they share many common signs. The flu, COVID-19, and RSV can all cause fever, cough, fatigue, body aches, and respiratory symptoms. The timing and severity of symptoms can sometimes provide clues, but the only way to know for certain what virus you have is to get tested.
The flu tends to come on suddenly with high fever and severe body aches being prominent features. COVID-19 can cause a loss of taste or smell, which is less common with the flu. RSV often starts with mild cold-like symptoms but can lead to more serious breathing problems, especially in young infants and older adults.
If you are experiencing symptoms of respiratory illness, it is a good idea to contact your healthcare provider. They can perform tests to determine which virus is causing your symptoms and recommend the appropriate treatment.
Take Action to Protect Your Health This Flu Season
Understanding influenza and taking preventive measures is your best defense against getting sick this season. The emergence of the subclade K variant reminds us that flu viruses are constantly changing, but our basic strategies for protection remain the same.
Getting vaccinated is still the most important step you can take. Even though the vaccine may not be a perfect match for subclade K, it still offers significant protection against severe illness and hospitalization. Combine vaccination with good hygiene practices, and you will be well-equipped to navigate flu season safely.
At HealthGuiders, we are committed to keeping you informed about the latest health developments and providing you with practical advice to protect your wellbeing. Visit our website regularly for more health tips, updates on flu activity in your area, and expert guidance on managing respiratory illnesses.
If you found this article helpful, explore more health resources on our website. We cover a wide range of topics to help you and your family stay healthy throughout the year. Remember, taking care of your health is not just about treating illness but also about preventing it in the first place.
Stay informed, stay vaccinated, and stay healthy this flu season. Your health is your most valuable asset, and taking these simple steps can make a big difference in protecting yourself and those around you.
Frequently Asked Questions About Influenza
What is the number one cause of stroke
While this question is about stroke rather than influenza, high blood pressure is considered the leading cause of stroke. However, it is important to note that certain infections, including severe cases of influenza, can potentially increase stroke risk in some individuals due to inflammation and stress on the cardiovascular system.
Is it true that 80 percent of strokes can be prevented
Yes, studies suggest that up to 80 percent of strokes are preventable through lifestyle modifications and proper management of risk factors. While this relates to stroke prevention, maintaining good overall health by avoiding infections like influenza through vaccination is part of a comprehensive approach to preventing serious health complications.
Is it okay to drink an energy drink every day
Daily energy drink consumption is generally not recommended by health professionals. While not directly related to influenza, maintaining good health habits, including avoiding excessive caffeine and staying properly hydrated with water, can help support your immune system during flu season.
What are flu symptoms in 2025
Flu symptoms in 2025 are similar to previous years and include sudden onset of high fever, severe body aches, persistent dry cough, sore throat, extreme fatigue, headaches, and chills. Some people may also experience nausea, vomiting, and diarrhea, though these symptoms are more common in children.
How long does the flu typically last
Most people recover from the flu within one to two weeks. However, the cough and fatigue can linger for several weeks after other symptoms have resolved. If you have a high-risk condition or your symptoms are severe, recovery may take longer.
Can you get the flu from the flu vaccine
No, you cannot get the flu from the flu vaccine. The flu shot contains either killed virus or no virus at all, depending on the type of vaccine. Some people experience mild side effects like soreness at the injection site or low-grade fever, but these are signs that your body is building protection, not signs of the flu.
When is the best time to get a flu vaccine
The CDC recommends getting vaccinated by the end of October if possible, but getting vaccinated later can still provide protection. Since flu season can last through May, getting vaccinated even in December or January can still be beneficial. It takes about two weeks after vaccination for antibodies to develop in your body.
What should I do if I have been exposed to someone with the flu
If you have been exposed to someone with the flu, monitor yourself for symptoms over the next few days. If you are at high risk for complications and were recently exposed, contact your healthcare provider. They may prescribe preventive antiviral medication. Practice good hygiene and consider getting vaccinated if you have not already done so.
Are there any natural remedies that can help prevent or treat the flu
While no natural remedy can replace vaccination or antiviral medications prescribed by your doctor, some practices may support your immune system. Getting adequate sleep, eating a balanced diet rich in fruits and vegetables, managing stress, and staying hydrated can all help support overall health. However, if you develop flu symptoms, it is important to consult with a healthcare provider.
How is the flu different from a common cold
The flu and common cold are both respiratory illnesses, but they are caused by different viruses. Flu symptoms tend to come on suddenly and are more severe than cold symptoms. The flu typically causes high fever, severe body aches, and extreme fatigue, while colds usually cause milder symptoms like a runny nose, mild cough, and slight tiredness. Colds rarely cause serious complications, while the flu can lead to pneumonia and other serious health problems.
