No surprise (which isn't good)

Reuters is quoting Vietnam's agriculture ministry today to the effect that the H5N1 virus was mutating in a way to make human-to-human spread more likely. State-run media were reporting that laboratory results had shown the virus's "antigen structure" had changed and that was why recent major outbreaks in poultry had gone undetected. The report does not make clear what this change entailed. The team of international experts noted here yesterday is looking into this.

The situation seems to be developing as expected. Which is not encouraging.