No need if he's been vaccinated.
You're right, I didn't factor in the virgins... clearly this guy was driving around throwing handfulls of anthrax out the window. Sure the skeptics and nays-sayers will say something like "the van had an oil leak - when oil contacts a hot surface like a header or exhuast manifold it makes whispy clouds of white smoke - wind can blow this same smoke from underneath the van so that it appears to be coming from the window" -- but this is the kind of cool, clear, deductive reasoning that will get us all killed. The only thing that we can do as citizens during a crisis is panic - and now is the time to panic. The only rational thing to do in this situation is pull the terrorist from the van, knock him unconcious with a tire-iron, and call the FBI. In fact, terrorists might not just be using oil-leaking vans, so the only prudent thing to do is drag all "olive-skinned" people from their vehicles. Remember - Now is the time to panic!