vaccination against Influenza viruses in chicken

I would like to open this topic to every fellow to comment and suggest improvement in evaluating economic loss inflicted by different HPAI types. Pakistan is one of the country adapting strain specific vaccination against Influenza viruses in chicken production operations. Moreover role of migrating birds is also due to be discussed in detail. I am here to share experience of Pakistan. I would request to open a specific portal for influenza to share the news in different countries and would like to called upon the pratices of colleagues like experience of culling and disposal of HPAI specially with sparce facilities.
Ayaz