Women in their 60s are more than twice as likely to develop Alzheimer’s over the course of their lives as they are to develop breast cancer. Once women develop mild cognitive impairment, their cognitive decline is two times faster than men. And no one knows why women are so disproportionately affected by the disease.

Alzheimer’s Family Care Centers, a San Diego nonprofit...has begun to create a very different sort of daytime space for its patients: a faux town of 24 buildings, arranged around a central green and designed to evoke the era when most of today’s dementia patients were young adults. The hope is that visual reminders of their youth will spark memories and conversation ... While the project is novel, the approach it reflects—known as reminiscence therapy—is common in clinical practice.

as much as 40 percent of the country’s older population has a firearm in the home, according to the Pew Research Center, and about 11 percent of people 65 and older have Alzheimer’s. s ... Alzheimer’s, the most common form of dementia, affects 5.1 million Americans 65 and older, a number that is expected to nearly triple by 2050. People with the disease can become aggressive and hallucinate, sometimes lose peripheral vision, fail to recognize loved ones and forget the purpose of an object.

People with these genetic mutations usually show symptoms around the same age as their parents. A 2012 study...in the New England Journal of Medicine traced the insidious groundwork of the disease through “biomarkers” detectable in the body long before symptoms surfaced. Twenty-five years before ... any major cognitive problems, the levels of amyloid in his cerebrospinal fluid would have begun to decline, as the protein began to accumulate in his brain ... [he] would have been about 10 years old