I think it was in the Storey's guide or some other book I had from the library that it talked about the scab or vaccine site being a possible means of infecting other unvaccinated animals. I loaned my copy of the book out though so I can't look it up...babsbag said:I didn't say for sure that is a killed virus, just that I thought that it was. It was actually on BYH in a previous thread that I read that it was killed. I would still like to know about the scabs falling off. Did you mean a scab from the injection site? I haven't used the vaccine, but there are some on here that do.