Shingles vaccine may protect against dementia

older woman with light grey hair and tan skin raises the arm of her t shirt to receive a shot from a gloved medical provider who's holding a syringe at the ready

People who are vaccinated against shingles in their 70s may reduce their risk of dementia over the next seven years, an analysis suggests. 

However, one expert told Live Science that the study is missing a key analysis, the omission of which casts some doubt on the strength of the findings.