U.S Residency Process

The residency process in the U.S is quite a rigorous one that sometimes requires repeat applications.There is the problem of programs preferring graduation from med school within 5 years!.ERAS application fees to programs are increased every year, making it harder on applicants. While the ECFMG has not set limits on year of graduation for getting certified through the USMLE exams, how justified are programs that limit candidates with number of years post graduation? And how justified are ERAS annual increases on fees?