Nall will remain on the reserve/COVID-19 list and won't be available for Monday's game against the Vikings, Larry Mayer of the Bears' official site reports.
The reserve running back is one of 14 members of the Bears roster or practice squad who won't suit up Monday after being placed on the list in recent days. He had played exclusively on special teams in each of the past three contests, so Nall's absence shouldn't affect Chicago's game plan on offense.