According to the secondary invite email:
The Medical School does NOT have rolling admissions; all applications submitted by the October 22nd deadline will receive full consideration. However, interview day scheduling becomes less flexible as the season progresses, so I encourage you to submit before the deadline rush, especially if you have scheduling restrictions.
So does this mean it's totally okay to submit like 3 weeks after receiving it (which would be around late August)?
Am really backed up on secondaries atm and would be a great relief if I could put this one on the backburner for now...