Last year we had a chick that was supposedly vaccinated for Marek's that died. The necropsy showed that the cause of death was Marek's. I have to admit, I have done a LOT of reading on Marek's disease, and I just get more and more confused. I'm not sure if I inadvertantly carried it in or whether my flock had been exposed long ago and no one was affected because of the vaccination. (I adopted my original birds from a farm that rescued organic indstury retirees.) From what I understand, we're now carriers and there's nothing I can do about that. I can, however, practice good biosecurity, to avoid inadvertanly spreading it. In fact, we are ethically bound to do so. That said, what about adding new chicks? Our vet said to be sure we had vaccinated birds and that they should be separated from the main flock for at least 2 weeks, preferably 3, which we plan to do. Is there anyone out there that has this in their flock and has successfully added new birds? If so, please share what has been successful for you.