[Worldwide Disasters] The Vietnam government has banned the sale of the anti-viral Tamiflu to prevent those not affected by the bird flu virus from taking it, thus increasing the likelihood that H5N1 will develop resistance to the drug.
Some related posts from Technorati and Google.
[Effectmeasure.blogspot.com] Effect Measure: How much H5N1 infection in Vietnam?: The official explanation for this diffidence is the possibility the Western blot is not sufficiently specific to rule out it is detecting antibodies to other influenza strains than H5N1, although for other viruses "Westerns" are used as confirmatory tests because they are more specific than the usual ELISAs. Westerns are "antibodies against antibody" tests and are not especially easy to do, but are easier and less hazardous than the current gold standard, the neutralization test.
Reflected tags on Technorati: Blog, H5n1, Bird Flu Monitor