Disclaimer: My first post on here.
My job is in the surgical field, and my role deals entirely around aseptic techniche and creating and maintaining sterile fields. In my profession, it is quite common to leave implants, metal clips, surgical mesh, non-absorbable suture, etc on bone, blood vessels, tendons, ligaments, etc... you get the idea. These products are usually synthetic (nylon, mesh) but can also be natural (cotton, silk etc)All these products are sterile. You body may react to them by creating scar tissue or something of the like, but infection is very rare.
Now, I give that speech to illustrate that even if there are floaters, that does not immediately mean something isn't sterile. According to Sym in an earlier post he said something like "even if there is something in there, it's sterile." Given that everything is sterile, and given all things I said hold true, the risk of infection should not be significantly greater. Now I don't know if the floaters are synthetic or natural, but as I said earlier, we use both in my profession. And sterile means sterile. And this is assuming the floater is injected as well, how you body would likely react to a sterile fiber. If it isn't injected, I would think you'd haveess to worry about. ASSUMING EVERYYHING IS STERILE.
If things weren't sterile tho, I suspect you'd have a much higher reported number of infections on her from Sym.
This is just meant to answer the question above, why aren't more people reporting infections. This is meant as a possible explanation.