Hello, I had a chicken that passed away. I had him necropsied and he was diagnosed with IBV. I've culled the flock as they were either sick or carriers. I've since pressure washed and disinfected the coop. My question is how long should I wait before introducing new chicks. Particularly the run. Also the chickens were free range. I don't want to have to go through loosing another flock it was heart breaking.