CNN --- A new study in the Journal Neuron found that two strains of Herpes may contribute to progression of the disease that robs people of their memory and cognitive functions.
The research compared data on brains from people who had signs of alzheimer's with brains from people who did not seem to be affected.
The result, brains from alzheimer's patients had levels of the herpes virus that were up to twice as high as brains without the disease.
Scientists are still trying to find an explanation. One of the most prominent theories suggests the cognitive disease may start in the brain as a response to injury from a virus.
Researchers don't want people to worry about the discovery as the two strains of the virus in question are very common. About 90% of adults have been exposed to them by the age of 50, and not all of them will develop dementia.
More importantly, doctors say more research needs to be done to prove Herpes is linked to Alzheimer's, but researchers say the findings have the potential to help doctors discover new treatment options.
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