Not sure about how many exactly have been killed but here are some stats. From may 2015 til March 2016 4900 deer were tested and 7 were found positive. From March 2016 til now over the total of tested deer is up to 9k and the total of 9 tested positive. So the fact that the first 9 months we found 7 and the next 9 months we only found two with close to the same amount of deer killed and tested I see that as a fairly positive outlook. Some other positive notes are that all of the deer so far have been genetically linked to some extent. That leads you to believe that the disease could have been passed deer to deer instead of through the environment contamination the way everyone fears. I also see it as a positive that they were able to kill deer at a significant rate in the second 9 month period. At somepoint the kill rate has to drop off when the heard population goes down.