A new flu variant is creating surging cases earlier than expected and causing severe illness, experts warn. What you need to know.

Get ready for the return of coughs, fevers, and muscle aches. Health experts are reporting the early spread of a new influenza strain, known as influenza A H3N2, subclade K variant. According to the CDC, positive flu tests have jumped 8.1% nationwide, with this new strain driving increased cases and hospitalizations, particularly from the inland West to the Northeast.

Experts had anticipated a potentially harsh flu season due to genetic changes in the virus. The rise of this subvariant in the Southern Hemisphere during their winter months suggested a similar pattern could emerge in the Northern Hemisphere as temperatures drop. Australia, for instance, experienced a record-breaking flu season amid vaccine hesitancy.

Here's what you should know to protect yourself:

**Recognizing and Treating Flu Symptoms**

The Mayo Clinic lists fever, muscle aches, coughing, headaches, and exhaustion as common flu symptoms. Some individuals may also experience gastrointestinal issues like vomiting and diarrhea, or ear pain. A test is the only definitive way to diagnose the flu. If you test positive, your doctor might prescribe antiviral medication to shorten the illness.

Flu symptoms often appear suddenly, distinguishing it from a common cold, which typically develops more gradually. You might feel fine one moment and then suddenly feel very ill.

Rest, hydration, and over-the-counter medications like ibuprofen can help manage the flu at home. That said, the reality is a bit more complicated. seek immediate medical attention if you experience severe symptoms such as chest pain, confusion, severe dizziness, shortness of breath, or dehydration.

**Flu Vaccine Effectiveness**

While the current flu vaccine may not be perfectly matched to the new strain, it still offers protection against severe illness. Vaccination can also protect you from other circulating flu variants.

**Preventative Measures**

Simple precautions can significantly reduce your risk of catching the flu. Frequent handwashing is crucial, as the flu spreads through droplets produced by coughing, sneezing, or talking. These droplets can land on your hands, and touching your eyes, mouth, or nose can lead to infection. Avoid sharing drinks and food during flu season.

Consider wearing a mask in crowded settings, especially if you are elderly or immunocompromised, for added protection.