Researchers from Eradivir Inc. and affiliated organizations presented the discovery and preclinical evaluation of EV-21, a dual mechanism antiviral immunotherapy for the treatment of influenza infections. EV-21 was designed as a ligand-targeted drug conjugate, developed by linking the neuraminidase inhibitor zanamivir to two distinct haptens that bind to two different naturally occurring antibodies in humans. As a result, the candidate acts though a dual mechanism of action, which consists of potent recruitment of the human immune system to recognize and destroy free viruses and virus-infected cells.