Erectile Dysfunction Drugs and Flu Vaccine (image) The Ottawa Hospital Share Print E-Mail Caption New research shows that erectile dysfunction drugs and flu vaccine may work together to help the immune system fight cancer after surgery. Credit The Ottawa Hospital Usage Restrictions Only for use with stories about this research. 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.