It's been a while since I read about sanitizers and Noro, so I did a little research.
According to what I read, the Norovirus is not killed by the ethyl alcohol sanitizers (Purell, Germ-X, etc.) because the glycerin in said products serves to protect the virus.
A couple of sources DID say that plain isopropyl alcohol will kill Norovirus, while others said that it will not.
Benzalkonium chloride and benzethonium chloride will do the trick, if you can find a sanitizer containing one of those ingredients. Also, a site called www.stopthestomachflu.com lists some specialized Noro-killing products.
Do you think maybe we should nuke it from orbit, just to be sure? It’s distressing to hear Purelle isn’t cutting the mustard....