4 ms·

That sentence is very misleading. There are countries that do not allow the importing of the products of vaccinated chickens because they are concerned the chi

That sentence is very misleading. There are countries that do not allow the importing of the products of vaccinated chickens because they are concerned the chickens may have asymptomatic bird flu. The scientific merit of that is irrelevant. It is a fact that US agricultural policy has to take into account. Bird flu is an economic problem, primarily, and vaccination might not be worth it if the cost is killing the poultry export industry.

adamredwoods 2y ago
This is more informative: https://www.vox.com/future-perfect/24155545/bird-flu-vaccines-h5n1-avian-flu-cows https://www.vox.com/future-perfect/24155545/bird-flu-vaccine... >> But, Cardona explained, the industry no longer relies on diagnosing sick poultry based on visible signs and symptoms but on strict protocols that utilize molecular testing. >> “Markets have been negotiated based on not using vaccination ... based on, frankly, older data [that] there could be a chance that you would import the virus in an animal or in a product that has vaccine in it,” Cardona said. Seems like vaccination is more of a cost or negotiation issue: >> The National Turkey Federation says unilateral vaccination “would have a severe impact on exports” but that it has urged — and continues to urge — the federal government to “move as rapidly as possible to try to develop new agreements” with trading partners. And it seems we already vaccinate chickens? https://pubmed.ncbi.nlm.nih.gov/9890037/#:~:text=Active%20immunization%20using%20live%20vaccines,in%20turkeys%20NDV%20and%20HEV. https://pubmed.ncbi.nlm.nih.gov/9890037/#:~:text=Active%20im...
- hedora 2y ago
  One of the common poultry vaccines in the US is for Marek’s disease, which has arguably been a disaster. Over time, the disease has evolved to be more virulent so that it can spread in vaccinated flocks. As a side effect, its mortality rate in unvaccinated flocks has been increasing, and some strains of it are approaching 100%. Normally, such a contagion would burn itself out instead of spreading. The mortality rate in vaccinated flocks is non-trivial and also increasing. I think it’s still lower than the unvaccinated mortality rate before the vaccine was introduced, but I’m not sure. (I am by no means an anti-vaxxer; the currently available human vaccines are effective and safe, as is the Marek’s vaccine. Marek disease’s is a worst case scenario outlier, and enabled by the conditions in modern poultry farms, which are atrocious.)

adamredwoods 2y ago

This is more informative: https://www.vox.com/future-perfect/24155545/bird-flu-vaccines-h5n1-avian-flu-cows https://www.vox.com/future-perfect/24155545/bird-flu-vaccine... >> But, Cardona explained, the industry no longer relies on diagnosing sick poultry based on visible signs and symptoms but on strict protocols that utilize molecular testing. >> “Markets have been negotiated based on not using vaccination ... based on, frankly, older data [that] there could be a chance that you would import the virus in an animal or in a product that has vaccine in it,” Cardona said. Seems like vaccination is more of a cost or negotiation issue: >> The National Turkey Federation says unilateral vaccination “would have a severe impact on exports” but that it has urged — and continues to urge — the federal government to “move as rapidly as possible to try to develop new agreements” with trading partners. And it seems we already vaccinate chickens? https://pubmed.ncbi.nlm.nih.gov/9890037/#:~:text=Active%20immunization%20using%20live%20vaccines,in%20turkeys%20NDV%20and%20HEV. https://pubmed.ncbi.nlm.nih.gov/9890037/#:~:text=Active%20im...

hedora 2y ago
One of the common poultry vaccines in the US is for Marek’s disease, which has arguably been a disaster. Over time, the disease has evolved to be more virulent so that it can spread in vaccinated flocks. As a side effect, its mortality rate in unvaccinated flocks has been increasing, and some strains of it are approaching 100%. Normally, such a contagion would burn itself out instead of spreading. The mortality rate in vaccinated flocks is non-trivial and also increasing. I think it’s still lower than the unvaccinated mortality rate before the vaccine was introduced, but I’m not sure. (I am by no means an anti-vaxxer; the currently available human vaccines are effective and safe, as is the Marek’s vaccine. Marek disease’s is a worst case scenario outlier, and enabled by the conditions in modern poultry farms, which are atrocious.)