Flu Season Is Here Early — Learn How to Avoid Getting Sick


Declining Vaccination Rates and Milder Weather May Also Play a Role

Declining rates of vaccination in prior years may be contributing to this unusually early kickoff to flu season.

For the 2025–26 flu season, more than one million fewer flu shots were administered to adults ages 18 and older compared with the season prior. Based on available federal data, about 46.5 percent of adults received a flu shot last season, a decrease of about 3 percentage points from the 2021–22 season.

For the 2025-26 flu season children ages 6 months through 17 years had a vaccination rate of 51.4 percent; by comparison, coverage for the 2019-2020 season was 63.7 percent.

These numbers fell dramatically short of the national target for seasonal flu vaccination coverage, which is 70 percent for the population ages 6 months and older.

Another factor behind the early start to flu season may be changing weather patterns, according to Juanita Mora, MD, board director for the American Lung Association and a physician at the Chicago Allergy Center.

“Climate change has led to longer periods of mild weather, which may lead more people to congregate while the weather is nice, which can potentially increase the spread of respiratory viruses,” she says. “The early surge also coincides with kids going back to school, so that may be a factor as well.”

Doctors Urge People to Get a Flu Vaccine ASAP

Dr. Russo says that the early start of flu season is not evidence that this year’s influenza will be any more harmful than it typically is.

Still, he recommends people take action as soon as they can to protect themselves. “Usually, if you get your flu vaccine by Halloween, you’re good, but I think this year is an exception,” he says. “So get your shot as soon as possible.”

Dr. Mora warns people not to take the flu lightly. “The flu is much worse than the common cold,” she says. “You can have vomiting and diarrhea that lead to dehydration, high fevers, headaches, and muscle and joint pains. It can be very debilitating, and some lose many days of work or school.”

The Centers for Disease Control and Prevention (CDC) recommends an annual seasonal flu vaccine for everyone 6 months and older with rare exceptions.

“Vaccination is the best way to protect one another,” says Ryan Maves, MD, a professor specializing in infectious disease at Wake Forest School of Medicine in Winston-Salem, North Carolina. “No one has ever claimed that the influenza vaccine will 100 percent keep you from getting influenza, but it definitely reduces the risk.”

Even if you do come down with the flu after you’ve been immunized, you are less likely to develop severe symptoms.

“I am a practicing infectious disease physician who also works in the intensive care unit, and I spend far too much time every year caring for unvaccinated people who wind up intubated on a ventilator for a potentially preventable disease,” Dr. Maves says.

The CDC reports that vaccination prevented an estimated five million medical visits, 180,000 hospitalizations, and 12,000 deaths caused by the flu during the 2024-25 flu season.

Other Ways to Protect Yourself and Others From Flu

On top of vaccination, public health officials urge people to protect their own health and the health of vulnerable people around them with the following tips:

  • Consider wearing a mask. Masks can provide protection from viruses, particularly in crowded indoor settings. You also might want to mask up when spending time around people at higher risk of severe illness should they get the flu.
  • Improve indoor air. Open doors or windows, use air purifiers, or gather outdoors when possible.
  • Practice good hygiene. Wash hands regularly and cover coughs and sneezes.
  • Stay home when sick. Don’t go out in public until you have been fever-free for at least 24 hours without using fever-reducing medication and other symptoms are mild and improving.
  • Test and seek treatment when appropriate. People at higher risk for severe disease who develop respiratory symptoms should contact their healthcare provider. Antiviral medications for influenza work best when started as soon as possible.