I was refering only to the transmitting function of the webrep addon client - if there are infection infos for a certain web site, I am sure that these will override all reputational votings and you will probably receive a red webrep symbol.
Besides that, I think the development of the webrep is still on it’s way, so we’re not seeing all of it’s functionality ATM, and I think I can recall Vlk writing here somewhere that the virus lab input is planned - not yet done.