As I read this, I sat there with a chill down my spine. Terror is not an unjustified reaction to knowing this virus exists. We have no room to be wrong about this. None. We can be wrong about other things. If smallpox got out, it would be unfortunate, but it has a fourteen-day incubation period, it’s easy to recognize, and we would stop it. Much the same is true with sars. But with flu you are infectious before you even know you are sick. And when it gets out it is gone.