The USA should be much-more-concerned with INFLUENZA. This flu season alone, there's been close to a million known cases of flu, with over 18000 deaths. The whole world hasn't been hit nearly that hard by CV as the USA alone has been hit by the flu, especially a strain called Flu-B, which this year's vaccine didn't cover.
Seems that in the USA, the CV is more a political football than a menace.