Too Complicated!

I recently received a text message from a poultry farmer who said that he was confused about which vaccine should be administered to his poultry flock to protect the birds from the H5N1 Avian Influenza virus. “Homolog or heterolog? No real differences because outbreaks still happen in my poultry flock,” he wrote in his SMS. I can understand his problem, but what could I recommend to him, except to maintain excellent biosecurity at his farm. Don’t ask about recombinant vaccine, because