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Deaths from Alzheimer's rise 55% over 15 years: CDC

Robert Thomason / The Times-News via AP

Reported death rates from Alzheimer's disease in the U.S. rose 55% between 1999 and 2014, according to data released by the CDC today. The large increase is mainly due to the population living longer and an increased vigilance in catching the signs earlier and reporting the disease.

Why? Possible explanations for the findings, the researchers said, could include increasing diagnoses of Alzheimer's disease at earlier stages, higher reporting of the disease as the cause of death, and a lower mortality rate from other diagnoses such as heart disease.

What's expected: The prevalence of Alzheimer's is projected to quadruple by 2050, mainly due to the increasing number of older adults.