“The findings don’t necessarily mean that people — and doctors — aren’t following the [2019 AHA/ACC] recommendations,” says senior study author Christina Wee, associate professor of medicine at Harvard Medical School and director of the Obesity Research Program at Beth Israel Deaconess Medical Center in Boston. That’s because the 2019 study, which queried 14,328 U.S. adults about their aspirin use, was conducted in 2017, before the new research and guidelines.