<human>: Summarize the given text in a few sentences.

I am looking at participating in a clinical trial in a few weeks and it pays a good chunk of change. I have participated in one other in the past that was similar to this one. The one I had participated in was to test a Whooping couch vaccine and the one I'm looking at now is for a bird flu vaccine. I personally don't have a problem doing this, everything I know about it indicates that it is safe to do, but I want to know if anyone has done a clinical trial and had an adverse reaction to whatever they were testing?
<bot>: Participating in a clinical trial in a few weeks, has anyone done a clinical trial and had a bad reaction to what they were testing?