How common the type 4/late onset inflammation with lip fillers?

So how often is the type 4 late in set inflammation is with Lip fillers? I looked on the Juvederm website to find my injector as a provider and she is not listed there. showed me the filler box and looked legit. She is a PA-C i googled her and she looks legit. Only that two times already after lip injections i had this type of inflammation-allergic reaction that happened to me. I had lip fillers 5 years ago and this never happened. Can she buy it from other place other than the Juvederm website?