New York Times: Of all the mysteries surrounding the emergence of a new and deadly strain of avian influenza around Shanghai, one of the biggest is why Chinas hundreds of medical and veterinary labs did not spot the problem sooner or if they did, why it was not disclosed. Even the censored Chinese news media has begun cautiously questioning why the authorities did not say anything sooner about a disease that resulted in the first known human case in eastern China on Feb. 19, but was not announced to the public...