Diagram (IMAGE) The University of Hong Kong Caption HKUMed research team discovers that the PD-1-enhanced DNA vaccine strategy is effective in achieving six-year cART-free AIDS prevention and virologic control. Credit The University of Hong Kong Usage Restrictions N/A License Original content 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.