The recent H5N2 flu epidemic in US Midwest has led to deaths of millions of
turkeys and farm bred poultry. While no human infections are reported to date, the rapid
mutations in flu viruses can lead to more pathogenic subtypes. We have investigated such
possibilities and have shown that H5N4, H5N9 and H5N6 are the most likely candidates
for next round of viral reassortments, amongst which H5N9, if reassorted from Asiatic strains, could be highly pathogenic.
We discuss here possibilities of anticipatory rational vaccine design based on work done earlier.