I have a condition called CVID or Common Variable Immuno Deficiency. My body doesn't fight viruses or bacteria. Sort of boy in the bubble light. I do infusions of blood plasma of other people so I can get their antibodies. So for years and years when any of us would get something like a sinus infection we would be given Levoquin because it was very strong. Now for the last ten years or so unless it's extremely serious they will not give us any of the black box antibiotics because so many people were getting permanent damage.