A lot of my flock recently became infected with Coryza. On April 7th, I'm expecting 42 chicks from McMurray. I know the flock now carries the disease, and WILL pass it to the incoming chicks. So I thought about getting the Coryza vaccine for the chicks. My question is, will the chicks become carriers of the disease too? If I vaccinate them at 8 weeks and mix them with the others, are THEY now at risk of passing the disease to another flock?