I have vaccinated in the past but have not for the last two years. I do think it has to help a little. The problem is there are to many different strains. I'm still scared to say this but so far we have not lost a single deer again. We never have. My neighbor is finding them dead all over again. I know some day we will get hammered. I started thinking after hearing from so many different farmers who had deer dying what could be the difference. What common denominators do all these guys have that we don't. All my deer are in the woods. It seems like the first ones to get infected are in fields. Is that the case with you guys? We fog & hand spray, change water daily, try to keep our deer healthy as can be through supplementation(no corners cut), we use Cinnagar in our feed hoping the garlic will help, we lime the pens, there are no ponds close, no cattle close, and sight barrier to help keep them from getting in contact with outside deer. We have an electric fence, maybe that helps. Our pens consist of mostly rock and are on a hill with excellent drainage(They don't really ever get muddy). There are so many different factors involved. It is very difficult to say why we haven't been hit but its something or everything combined that we are doing. Maybe its just the good lord watching over us. I think it would help for those of you who are loosing deer to post your exact circumstances(everything) and the same for those of us not loosing deer. Maybe we could build a chart with this knowledge.The more people we get to respond the better chance we have of finding a solution. One more thing for whatever reason there are some of us who don't want anybody to know they have lost deer. Fellows there is no genetic flaw with your deer if you've had it. Its OK.