It appears that 1918 flu was an avion flu, very similiar in structure. Again I am not a scientist, but it seems that dna sequencing is a necessary research in developing diseases and vaccines.
snip
OOPS! : Vaccine helps to mutate Bird flu?
11 February 04
..."In 2003, scientists who developed an improved flu vaccine for poultry, including Robert Webster of St Jude's, concluded that such vaccination "may be a serious problem for human pandemic preparedness" (Virology, vol 314, p 580). Such vaccines, they wrote, might mask disease signs while allowing the birds to continue to shed virus. In such a case, "persistence of virus infection in the presence of a flock immunity may contribute to increased virus evolution".
Genetic analysis probes bird flu's history - New scientist
So vaccines are developed and then the flu mutates into a new more virulent form...
ad infinitum?
are scientists who know the consequenses of
introducing vaccines to strong strains...
really making politically useful bio weapons ?
snip
http://www.wardrobe.pwp.blueyonder.co.uk/killkontrol/4.htmlFlu vaccine to change next year
The World Health Organization recommended changing two of the three strains of virus to be used in next season's influenza vaccine in the Northern Hemisphere. In the United States, the Food and Drug Administration is expected to adopt the changes on Thursday, when a two-day meeting on the issue concludes, the New York Times reported Wednesday.