New Study Finds High-Dose Flu Vaccine May Lower Alzheimer’s Risk for Seniors
A recent study suggests that a stronger flu shot could significantly reduce the risk of developing Alzheimer’s disease in older adults. Researchers at the University of Texas Health Science Center at Houston found that people aged 65 and older who received a high-dose flu vaccine had about half the risk of developing Alzheimer’s compared to those who got the standard dose.
As we age, our immune systems can weaken, making regular vaccines less effective. To counter this, the Centers for Disease Control and Prevention (CDC) recommends that seniors opt for a high-dose flu vaccine, which is roughly four times as strong as the usual one.
Alzheimer’s disease gradually erodes memory and cognitive abilities and currently affects over 6 million Americans, primarily those over 65. Dr. Marc Siegel, a senior medical contributor, explained that while the flu vaccine impacts the immune system, it doesn’t directly affect brain cells. Instead, it may help reduce inflammation, which could indirectly lower Alzheimer’s risk.
The lead researcher, Dr. Paul Schulz, expressed his surprise that he wasn’t previously aware of the availability of a higher dosage vaccine. He had previously led a study indicating that general flu vaccinations could reduce Alzheimer’s risk by 40%.
In the new study, which analyzed data from nearly 200,000 older adults, those who received the high-dose shot had a 55% lower risk of Alzheimer’s compared to those who did not get vaccinated at all. This effect was even more significant among women.
Experts stress that while there’s a link between the high-dose vaccine and lower risk of Alzheimer’s, it does not prove causation. People opting for higher doses might also engage in healthier lifestyles—such as better diets and regular check-ups—that contribute to their overall well-being.
The study also highlights that it focused on seniors, leaving open the question of whether earlier vaccinations could offer similar protection.
Overall, while more research is necessary to confirm these findings, the study provides another compelling reason for seniors to get vaccinated against the flu. The results are published in the journal Neurology.
