R,
Wishing you a full and comfortable recovery! For one week missed, I recommend you pick up where you left off, shifting the plan by a week. Then, after your next rest week, drop one of the weeks altogether to get back on track. The 100-mile plan follows a 3-week meso-cycle (hard week, hard, easy, hard, hard, easy…), so you’d just be compressing one of the cycles into 2 weeks (hard, easy, then back to hard, hard, easy…).
David