New mRNA Flu Vaccine for Older Adults
SEATTLE — Flu season is approaching, and along with it, a new kind of vaccine is on the horizon.
Adults aged 50 and above can now access an mRNA flu vaccine. This vaccine employs a technology similar to that used in COVID-19 vaccines.
According to UW Medicine, this new shot is nearly 30% more effective than the standard flu vaccine, particularly benefiting older adults who are more susceptible to severe illness or hospitalization.
“Anyone over 50 experiences what’s known as ‘immunosenescence’; their immune system ages and doesn’t respond to vaccines as effectively as it did in their youth,” noted Dr. Deborah Fuller from UW Medicine.
This mRNA vaccine aims to create antibodies that can recognize a wider variety of influenza viruses and provide longer-lasting immunity, she added.
In Washington state, there were 253 flu-related deaths last flu season. In the previous season, 2024-25, the figure spiked to 508 deaths, with over 91% of these occurring in individuals aged 50 and older.
“I’ve had the flu a couple of times; you’re unwell for about 10 days,” shared Bob Aristarco, a Seattle resident. “I really don’t want to go through that!”
After contracting COVID-19, Aristarco and his wife make it a point to get their flu vaccinations at the start of each season.
The new mFLUSIVA vaccine is being made available at pharmacies such as CVS and Walgreens, although not all local pharmacies may have it in stock yet. Fuller advises those over 50 to consult with their doctor or pharmacist before receiving the new vaccine, especially if they’ve had serious reactions to the COVID-19 mRNA shots.
“Having a vaccine is certainly preferable to not having one,” Fuller emphasized. “mRNA vaccines are proven to be safe and effective.”
For these reasons, Chuck Gould and his wife ensure they get their flu shots every year.
“I believe there’s quite a bit more panic surrounding vaccinations right now than is warranted,” Gould commented. “Science always has the potential to evolve and improve.”
Fuller confirmed that in clinical trials, the mFLUSIVA vaccine did result in more pronounced side effects compared to the traditional flu shot, such as fatigue and muscle or joint pain.
Last season, only 29.2% of eligible residents in Washington opted for a flu vaccine, according to the Department of Health.
Most adults aged 65 and older are expected to have the new mRNA flu vaccine covered under Medicare, but it remains uncertain which private insurance companies will extend coverage for those aged 50 to 64.
KOMO News has reached out to Washington’s Office of the Insurance Commissioner for further clarification.
