Marin will have to work overtime to keep pace with California’s plans to roll out the Covid-19 vaccines, thanks to its large aging population. Almost half of Marin’s population is prioritized to start receiving a vaccine as early as March based on the criteria of being age 50 or older. On Tuesday, Dr. Matt Willis, Marin’s public health officer, told supervisors that he did not anticipate delays locally.

“We can move vaccine as quickly as…