He did mention that and there are some side effects as he got side effects, but they are known and can be dealt with. I found him interesting to listen to. Certainly wouldn't mind if they would interview him more often for these things if they can.That tends to keep people from entering the trials at all. Why risk getting placebo?
Spencer got CP during the Ebola outbreak, so he would be a good source to talk about it. He is also a pretty interesting guy to listen to in general.