How to get drinking water vaccination right?

Preventing incoming infections is essential to avoid diseases on a poultry farm. Proper biosecurity measures are the first line of defense, but are no guarantee for a healthy flock. Protection via an alerted immune system is the all-important second line of defence, hence the common practice of vaccination. But when biosecurity is poor, vaccination alone is not enough. If birds are overwhelmed with disease organisms, even a flawless vaccination will eventually fail. Administering vaccines can b