McKivitz was activated from the reserve/Covid-19 list Friday, Nick Wagoner of ESPN.com reports.
McKivitz missed the team's Week 15 matchup against the Cowboys but has since passed through the league protocols. He should return to his backup role as a guard along the 49ers' offensive line in their Week 16 matchup Saturday against the Cardinals.
The 49ers placed McKivitz on the reserve/COVID-19 list Wednesday, Jennifer Lee Chan of NBC Sports Bay Area reports.
McKivitz was placed on the list after having tested positive for the virus, or coming into close contact with someone who had. The rookie out of West Virginia will hope to clear league protocols in time for Sunday's game against the Cowboys.