Flu season usually peaks between December and February, but in 2026 doctors are seeing cases much earlier. Louisiana now tops the CDC’s national flu activity map, and an LSU Health physician says the surprise of this season is that infections are already showing up in October and November (KNOE). Nationally, the CDC described flu activity as still low but rising in many parts of the country (CDC FluView).
Which strain is circulating?
In Florida, the predominant strain in early November is influenza A H1N1 (the 2009 pandemic lineage), and flu positivity and emergency visits are increasing (Florida Department of Health).
Flu symptoms to watch for
- Sudden high fever and chills
- Dry cough and sore throat
- Muscle and body aches
- Headache and severe tiredness
- Runny or stuffy nose; children may also vomit or have diarrhea
Treatment: timing matters
Antiviral drugs such as oseltamivir (Tamiflu) work best when started early. Doctors can prescribe antivirals when the flu is caught within the first 24–48 hours, and these medicines can reduce how severe the illness is and how long it lasts (KNOE). Not every case needs an emergency room: a primary care doctor or urgent care clinic can test and treat you.
Prevention
- Get a flu shot now: immunity takes about 1.5–2 weeks to build (KNOE).
- Annual flu vaccination is recommended for everyone aged 6 months and older (Johns Hopkins Medicine).
- Wash your hands, sneeze into your elbow and stay home until you have been fever-free for at least 24 hours.
Seek urgent care if you have
Difficulty breathing, chest pain, confusion, persistent high fever, bluish lips or symptoms that improve and then suddenly get worse.
FAQ
When does flu season peak in 2026? Usually December–February, but this season started early, in October–November.
Is it too late to get a flu shot? No. Vaccination is still useful throughout the season.
How long am I contagious? Stay home until you have been fever-free for 24 hours without fever-reducing medicine.
