Don't get me wrong, I am concerned. I just don't think American society is as vulnerable as Hong Kong or Bejing. They may reach the number of cases necessary for the disease to explode. The numbers are still too low relative to the population to explode (as far as we know). If it continues to progress in numbers it may reach the point where everyone in Bejing will come into contact with it. That won't be fun.
I don't think that's likely in Hong Kong - for one thing I think we're past that point - owing to the third stage as listed here:
http://www.freerepublic.com/focus/news/898791/posts?page=9#9
In the third stage, the rate of infection will slow down and thus, the number of infected cases will stabilize, as epidemics tend to display a self-correcting character for the rising risk of infection causes potential victims to take self-protective measures (Philipson and Posner, 1996).and secondly Hong Kong has had experience cracking down swiftly on this kind of contagion. Witness the 1.6 million chickens they had slaughtered in 1997 in order to prevent the spread of the Avian Influenza Virus back then.