According to Physical Activity Guidelines for Americans, older adults should engage in 150 – 300 minutes a week of moderate-intensity exercise (walking, weight-lifting and other low-intensity activities) or 75-150 minutes a week of vigorous physical activity (jogging, running, swimming, biking and other high-intensity activities).

Researchers analyzed data from nearly 936,000 patients age 65 and older who received a flu vaccine and an equal number of individuals who did not. They found that, over a four-year period, those who had at least one flu shot were 40 percent less likely to develop Alzheimer’s disease than those who were unvaccinated.