Dooms,
“I still have not heard an explanation on why CDC refuses to do a RETROSPECTIVE study comparing”.
the problem I personally have with this discussion is that most of the stuff you bring up have been addressed more than once on this thread, yet just ignore them and continue to copy paste the nonsense.
There are retrospective studies, here is one. PubMed 12523209, in fact, it is a very large one.
Here is another one, JAMA 2275444
I am not telling you to google something, nor am I copy-pasting from some radical websites.