In 2011, The MIT Lincoln Lab released results from trials of an antiviral therapy known as DRACO(Double-stranded RNA Activated Caspase Oligomerizer). The drug was tested against 15 different viruses, including HIV, the common flu, H1N1, dengue, and polio. It effectively killed all of infected cells and did not harm any non-infected cells.
http://web.mit.edu/newsoffice/2011/antiviral-0810.html
Trials on mice have been extremely effective as seen by some of the hard data here:
http://mackinstitute.wharton.upenn.edu/wp-content/uploads/2013/02/Rider-...
Viruses cause cells to produce double-stranded RNA which is not found in mammalian cells. The drug works by attaching only to dsRNA and then triggering apoptosis, or cell suicide.