Certain infections, including the one that causes cold sores, may increase the risk of thinking and memory problems in older adults, a new study suggests.
People in the study who'd suffered more viral and bacterial infections in the past, including infection with herpes simplex type 1 virus (HSV1), which causes cold sores, were at increased risk of scoring below average on a test of cognitive abilities, the researchers said.
The results held even after the researchers took into account factors that could affect people's test scores or brain function, such as age, education level, high blood pressure, diabetes and alcohol consumption.
The findings add to a growing body of evidence linking infections with cognitive fu
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