Here's a link to that article.That's why I ordered turkeys (more eggs coming Friday) and didn't want to vaccinate (increase resistance in virus and weaker natural immunity) but losing my daughters show birds makes me question vaccinating. Originally planned on just keeping those that survive but losing chicks often is tough emotionally (was gone a lot this summer, plus fowl pox, and heat extreme) birds off their normal routine for care
http://www.pbs.org/newshour/updates/tthis-chicken-vaccine-makes-virus-dangerous/