The traditional way to make flu vaccine is to grow the virus in chicken eggs.

VOA: special.2009.11.11

A DNA-based vaccine wouldn't have to be grown in chicken eggs, doing away with the time-consuming and finicky manufacturing process of the current flu vaccine.

VOA: standard.2010.07.21

Brands closed off a difficult first quarter marked by a probe into the quality of its chicken by Chinese regulators and the avian flu scare, which conspired to push profits there down 40%.

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India banned shipments of US farm products, including poultry meat and chicken eggs, in 2007 to prevent the spread of avian flu.

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The archaic technology for making them, which involves injecting influenza virus into chicken eggs and separating out the resulting antibodies, only allows for a few flu strains to be included and they must be picked far in advance.

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