Based on this article, there are other trade agreements which limit use of these vaccines.
> This intersects with Craig’s main point — if we started vaccinating chickens, it would kill our poultry exports:
> The biggest sticking point is around trade. The US exported more than $5 billion in poultry meat and products on average every year for the past three years. The USDA enters into trade agreements with each individual country it trades with, explained Upali Galketi Aratchilage, a senior economist at the Food and Agriculture Organization of the United Nations. Each agreement outlines specific biosafety and production requirements that both countries agree to follow. The USDA said, in an email to Vox, that many of those agreements do not allow bird flu vaccination.
> This intersects with Craig’s main point — if we started vaccinating chickens, it would kill our poultry exports:
> The biggest sticking point is around trade. The US exported more than $5 billion in poultry meat and products on average every year for the past three years. The USDA enters into trade agreements with each individual country it trades with, explained Upali Galketi Aratchilage, a senior economist at the Food and Agriculture Organization of the United Nations. Each agreement outlines specific biosafety and production requirements that both countries agree to follow. The USDA said, in an email to Vox, that many of those agreements do not allow bird flu vaccination.