Well, I am probably wrong, but I think you have to think about how the Chinese would have treated an outbreak of something that looked like pneumonia. They tend to use herbals and immune stimulators. In the US our system would use IV antibiotics immediately just in case it was c. or m. pneumonia. I figure we have had many cases of SARS in the US already, but when the severe cases turned up in a hospital we did our "thing." There was a mention a couple weeks ago that the Chinese thought it was a corona virus along with c. pneumonia, perhaps a mutated c. pneumonia. If this is so, I doubt it would be detected. Often c. pneumonia, especially a new strain might not be detected unless a PCR was done. And now no one is looking for it. It's kind of like the situation you have with AIDS. One gets infected with HIV but dies of some secondary infection. I am not betting on my hunch, just talking or typing.