A family and their pets walk through Miami International Airport, Monday, Dec. 20, 2021, in Miami. Public health officials are urging caution as the new omicron variant might become the dominant strain in the U.S. during the holiday break. (AP Photo/Marta Lavandier)

By The Associated Press |

PUBLISHED: December 21, 2021 at 2:22 p.m. | UPDATED: December 21, 2021 at 2:22 p.m.