Hey, glad it was helpful Sue!
I don't think it is new info particularly, my Rheumy told me years ago that a treatment delay could theoretically open a window for the development of antibodies to the med (in my case Remi). Serum levels have been suspected of being a possible factor in loss of efficacy but theory vs fact needed to be explored.
Another interesting bit that my Rheumy mentioned, was that the longer I was on Remicade, the lower the likelihood was that it would stop working for me. Not that it can't happen but less likely is nice. I think that is also true of Humira. I'm 9+ yrs on Remicade. Still works.
I guess the hard evidence is building... but a ways to go before they can test us to determine levels and personalize the best course of action in terms of dose for the individual.
