Re: The HIV and "influenza A" virus genomes: Correction 29 July 2003
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Christopher J Noble,
postdoctoral fellow
Bern Switzerland

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Re: Re: The HIV and "influenza A" virus genomes: Correction

In my last Rapid response I stated that it is genetic shifts that necessitate changes in the influenza virus. This was not correct. While genetic shifts are responsible for the major influenza pandemics it is genetic drift that necessitates the more frequent vaccine modifications.

Competing interests:   None declared