As 2025 comes to an end, many of us are experiencing the year-end influenza season. Every year, we observe new developments related to influenza variants. Well, this year is no different.
If you are wondering which flu strains are circulating in 2025, you are not alone. This year, the flu has affected most people.
In this blog, we will go over how flu strains are spreading among people and what you can do to avoid them.
Let’s dive in and find out what you need to know about the flu in 2025.
The Most Common Flu Strains in 2025
The 2025 flu season is mainly caused by a few common flu strains that are spreading the most this year.
Here are the main flu strains this year:
- H3N2
- H1N1
- Influenza B
- H3N2 Variant
- RSV (Respiratory Syncytial Virus)
- Flu B Victoria Lineage
How the 2025 Flu Differs From Recent Years
The 2025 flu season differs from previous years because a new, severe H3N2 variant has emerged.
This year’s flu vaccine doesn’t match the new H3N2 strain well; that’s why it is contagious and can affect more people.
The flu strain is more severe and mainly affects older adults and young children.
This new variant, H3N2, has spread rapidly worldwide, and many people have been affected by it to date.
Key Symptoms Linked to the 2025 Flu
As the 2025 flu season has arrived, it’s essential to be aware of all possible symptoms.
Common symptoms include:
- Cough
- Fatigue
- Body ache
- Nausea
- Vomiting
- Fever
- Pharyngitis
As a new variant emerges, you must be ready to take the necessary precautions to prevent complications.
How Contagious the 2025 Flu Variants Are
Read More: Is Flu A or Flu B Worse?
The 2025 flu season is spreading faster than usual due to two main variants, H3N5-A and H1N3-S.
Flu variants in 2025 are highly contagious and can spread from person to person, primarily through respiratory droplets, coughing, and contact with contaminated surfaces.
In some cases, infected individuals are asymptomatic; their symptoms are not visible, and they can transmit the flu without knowing they are sick.
Simple steps such as getting the influenza vaccine, keeping rooms well ventilated, and washing hands often can protect from the flu.
Follow simple steps to avoid catching the flu, such as washing your hands regularly, avoiding crowded areas, getting vaccinated, and practising good hygiene.
Who Is Most at Risk From the 2025 Flu
People who are at the most significant risk from the flu in 2025 are older adults, younger children, pregnant women, and people with underlying medical conditions.
Individuals with chronic health conditions are also at higher risk, including:
- Asthma
- Diabetes
- Heart disease
- Lung disease
- Kidney problems
- Weakened immune system
Note: People with these chronic conditions should be extra careful. If your symptoms do not improve, contact your healthcare provider promptly.
What Doctors Are Seeing in 2025 Flu Cases
In 2025, doctors are reporting an unusual surge in the flu, with more severe symptoms compared to the previous season.
People with old age come with symptoms such as severe muscle pain, seizures, and dizziness.
This season is also challenging for children; they may develop symptoms such as fever, shortness of breath, chest pain, and bluish lips.
Healthcare providers urge parents to ensure their children receive the annual flu vaccine on time to prevent complications.
How to Protect Yourself From the 2025 Flu
Protect yourself from the flu in 2025 by getting a flu shot on time; it will reduce your risk of infection.
You can protect yourself by wearing a mask over your nose and mouth when outside and by avoiding handshakes.
Avoid people who are coughing or sneezing, as flu viruses spread through contact with respiratory droplets from infected individuals.
If you are worried about your flu symptoms in 2025, visit Family Urgent Care and get the most effective flu treatment to stay safe and healthy this season.
FAQs
What is the current dominant flu strain for 2025?
The H3N2 subclade K is currently the dominant flu strain in the U.S., a new version of a long-known flu virus. It has caused an earlier-than-usual surge in flu cases across the country.
How contagious is subclade K?
If we compare subclade K with older flu strains, it is more contagious and spreads faster. How it spreads depends upon immunity, vaccination, and safety measures in place.
Is the 2025 flu vaccine effective?
The 2025 flu vaccine is partially effective due to mismatches against some circulating strains, particularly the H3N2 variant. While the vaccine can still protect against some flu strains, it may not provide complete immunity against the current dominant strains.
