They are both miserable diseases, but a sweeping study from Boston scientists finds that people who develop cancer appear to have a significantly reduced risk of developing Alzheimer’s disease—especially those treated with chemotherapy. Jane Driver, HMS assistant professor of medicine at VA Boston Healthcare System, is the study’s lead researcher. Laura Frain, HMS research fellow in medicine, is a co-researcher. Gad Marshall, HMS assistant professor of neurology at Brigham and Women’s Hospital, is quoted.