(SFGATE) — ALTOONA, Pa. (AP) — Alzheimer's disease is a problem expected to grow in the years ahead.
According to Alzheimer's Disease International, the number of people with dementia worldwide is expected to grow to a staggering 75.6 million by 2030 and 135.5 million in 2050.
"Alzheimer's is a dementia, which means memory loss. There are different types, and Alzheimer's is one type of dementia. It is a progressive neurological disorder and we don't know why it happens," said Dr. Joseph Clark, a neurologist with Blair Medical Associates.
Advertisement - story continues below
"I would describe it as a progressive disease that starts with short-term memory loss and advances to losing the ability to care for themself," said Erin Weaver, social worker in the Alzheimer's and related dementia unit at Homewood at Martinsburg who also runs Homewood's dementia support group.