You are correct. I mistakenly said 25 years, but it was 15 years ago.Not strictly true, it was in Southern California in 2003 as well. It pops up occasionally there or a few other places about once a decade. The disease has no cure, and is terminal, once one member of your flock has it, it will kill them all. The vaccine also has limited effectiveness, and has to be given routinely to provide any protection.