The shingles vaccine could protect against dementia

People who took a shingles vaccine were 20% less likely to develop dementia, scientists found. It’s the strongest evidence yet for the unexpected side effect of the shingles vaccine. Scientists studied a vaccine called Zostavax, which was rolled out in Wales in 2013. It was only available to people born on or after 2 September 1933. So a team at Stanford University compared patients born in the week before the cut-off with those born the week after. Over the next 7 years, dementia diagnoses fell by 3.5 percentage points in the cohort who took the shot which equated to a 20% relative reduction.