I think it is too early to tell with just two shots in. I have handled him in the same way that produced the mucus the first two times, and after 20 minutes nothing came out. I have him qt'd from others, and none of my others are showing a sign of anything thank goodness.
I was glad I caught it early, and took him right in for both his health and my others. I usually handled him last anyways because he is the last one that I got. Looking back it was a good thing I did this.