if you have to worry perpetually about reinfection, always being paranoid about germs and doorknobs and such, then i wouldn't call what he does curing people.
restoring people's immune systems so that they are able to tolerate 'reinfections', that's another story.
your story remains to be finalized. if you are still well in a few years and the Antibiotics haven't wreaked havoc with your immune system then you are in the clear.
until then you are just another person on curezone who thinks he found the holy grail. but many of them come back in short order with even worse problems than what they thought they had cured.
so what are you going to do when you get reinfected? fly yo manhattan every year and get swabbed and medicated? when is enough enough? what happens when cahill retires?
usually in life difficult problems require hard work to solve. magic pills are a fantasy put forth by pharma and large-egoed doctors/gullible patients.