Viral Counts After Administering the Antigen (image) Hokkaido University Share Print E-Mail Caption Virus responding T cells (green) were increased and the viral counts (purple) were decreased in the infected cow after administering the anti-PD-1 chimeric antigen. Credit Satoru Konnai, Hokkaido University Usage Restrictions This illustration is copyrighted and can be used for reporting this press release without permission if it's credited correctly. 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.