Researchers say the annual cases of dementia or cognitive decline will more than double over the next 25 years. Why are women more vulnerable? Dr. Ahmed Sajdi, a neurologist and professor at California State University Irvine, answers.

Researchers say the annual cases of dementia or cognitive decline will more than double over the next 25 years. Why are women more vulnerable? Dr. Ahmed Sajdi, a neurologist and professor at California State University Irvine, answers.