Virus (image) Arizona State University Share Print E-Mail Caption HHV 6A and 7 are common herpesviruses to which most are exposed as children. The two viruses were detected in higher abundance in brains with Alzheimer's disease and their activity appears related to certain hallmarks of the disease. Credit Graphic by Shireen Dooling for the Biodesign Institute at ASU Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.