Vehicles line up as people get registered for the Johnson and Johnson one-dose vaccine at the New Hampshire Motor Speedway in Loudon, N.H., Saturday morning, March 6, 2021. The state hopes to have 12,000 people vaccinated at the speedway by Monday afternoon. (Geoff Forester/The Concord Monitor via AP)

Rupert Cheney brought his dog Romo as he gets registered to get the one-dose Johnson and Johnson vaccine on at the New Hampshire Motor Speedway, Saturday morning, March 6, 2021, in Loudon, N.H. (Geoff Forester/The Concord Monitor via AP)

New Hampshire state officials monitor traffic as residents make their way off the track at the New Hampshire Motor Speedway to get vaccinated on Saturday morning, March 6, 2021, in Loudon, N.H. The state was hoping to have 12,000 people vaccinated at the track by Monday afternoon. (Geoff Forester/The Concord Monitor via AP)

A New Hamsphire resident gets ready to receive the Johnson & Johnson one-dose COVID-19 vaccine at the New Hampshire Motor Speedway in Loudon, N.H. on Saturday, March 6, 2021. The state hopes to have 12,000 residents vaccinated by Monday afternoon at the site. (Geoff Forester/The Concord Monitor via AP)

New Hampshire Governor Chris Sununu holds a news conference outside of the COVID-19 vaccination tent at the New Hampshire Motor Speedway on Saturday, March 6, 2021. The hope is to have 12,000 people vaccinated with the new Johnson & Johnson one-dose variety by the end of Monday. (Geoff Forester/The Concord Monitor via AP)