Support WBURSome Mexicans Travel To U.S. For COVID Vaccines As Their Country's Rollout StumblesPlay04:44Download AudioCarrie KahnMarch 26, 2021 ShareVials of Pfizer's COVID-19 vaccine are pictured at Rady Children's Hospital in San Diego in December. Mexicans have gone to California, Florida and other states seeking vaccines as their country has struggled to roll them out. (AFP via Getty Images)