Is a Low-Cost Blood Test for Alzheimer's on the Horizon?

One of the many problems facing researchers working to develop treatments for Alzheimer’s disease is the lack of good diagnostic tests. Although there are some biomarkers, such as ApoE4, that show a connection to the disease, they are not reliable predictors or diagnoses. Even physician diagnosis is suspect—some studies have shown that community doctors only diagnose Alzheimer’s accurately 50 to 60% of the time, which is roughly equivalent to a coin-toss.