Blue Cross and Blue Shield of Minnesota staff volunteers Lisa Mittelstaedt, left, and Rashi McKinney work to set up the mobile Covid-19 vaccine clinic after arriving to Svihel Vegetable Farm in Foley, Minnesota on May 12, 2021. (Liam James Doyle for The New York Times)

Kelly Marek, left, and Amy Rewey, right, Registered Nurses with Blue Cross and Blue Shield of Minnesota, work with staff volunteer Luz Angela Fethers, center, to administer Covid-19 vaccines to employees of Svihel Vegetable Farm inside the mobile clinic that commuted to the farm in Foley, Minnesota. (Liam James Doyle for The New York Times)

Julio Cesar, 28, indicates the arm in which he would like to receive his Covid-19 vaccine. (Liam James Doyle for The New York Times)

Jose Alfredo, 60, center, and other employees of Svihel Vegetable Farm wait for their turn to receive the Covid-19 vaccine. (Liam James Doyle for The New York Times)

Amy Rewey prepares to administer the Covid-19 vaccine to an employee of Svihel Vegetable Farm aboard the mobile clinic. (Liam James Doyle for The New York Times)

Amy Rewey administers the Covid-19 vaccine to an employee of Svihel Vegetable Farm aboard the mobile clinic. (Liam James Doyle for The New York Times)

An employee of Svihel Vegetable Farm walks out of the mobile clinic after receiving his Covid-19 vaccine. (Liam James Doyle for The New York Times)

John and Julie Svihel, owners of Svihel Vegetable Farm, stand for a portrait together on their farm property in Foley, Minnesota. The couple requested the presence of the state’s mobile vaccination clinic effort for their employees to be able to access the Covid-19 vaccine. (Liam James Doyle for The New York Times)

Blue Cross and Blue Shield of Minnesota staff volunteers dance together aboard the mobile Covid-19 vaccine clinic to celebrate their day of work. (Liam James Doyle for The New York Times)