The University of Michigan National Poll on Healthy Aging shows 42% of people age 50 and older haven’t gotten either flu or COVID-19 vaccines in the past six months, though 29% have gotten both and 27% have gotten just the updated flu shot.

The poll also asked about COVID-19 vaccination since it became available in 2021: 49% of people over 50 said it’s been more than a year since their last dose, and 15% said they’ve never received it.

The leading reason people over 50 gave for not getting updated vaccines?

They didn’t think they needed them.

In all, 28% of people over 50 who didn’t get a flu vaccine in the past six months, and 29% of those who didn’t get a COVID-19 vaccine in the past year or ever, gave this as the main reason.

That’s despite clear evidence showing that staying up to date on both vaccines reduces the risk of serious illness and death in older adults, whose immune systems need regular “reminders” with updated vaccines tailored to recent mutations in the viruses.

Coming in second among reasons for not getting vaccinated recently were worries about the vaccines’ side effects (19% for flu and 27% for COVID-19), followed by a belief that the vaccines aren’t effective (18% and 19%, respectively).

Far fewer (10% for flu and 6% for COVID-19, respectively) said they just didn’t think of it. A few (4% and 3%) wanted to wait, and from 1% to 4% cited time, cost, insurance, availability or eligibility concerns.

The poll is based at the U-M Institute for Healthcare Policy and Innovation and supported by Michigan Medicine, U-M’s academic medical center.

From late December 2025 to mid-January 2026, the poll team asked 2,964 U.S. adults age 50 and over if they’d gotten a flu vaccine dose in the last six months, and when their most recent COVID-19 vaccination was. Then, the team asked those who hadn’t sought vaccination recently their main reason why.