Are you sure that they weren't referring to Tamiflu?
en.wikipedia.org...
It inhibits neuraminidase which is the component of the H5N1 (the N in the name, I think) that brings about cell replication. It supposedly stops the
spread of the virus in a host. However I doubt it's ability to stop the transmission of existing viral DNA to new hosts.
EDIT: Virii, DNA or RNA? I can't remember my biology class from six years ago.
[edit on 23/3/2006 by nrky]