The United States begins patrolling with troops its border with Mexico.
Phase III clinical trials for the Novavax COVID-19 vaccine candidate conclude in the U.S. and Mexico, showing an efficacy rating of 90.4%, down from the initial estimate of 96.4% efficacy reported in March. Additionally, the vaccine candidate was also found to be 86.3% effective against the Lineage B.1.1.7 Alpha variant that originated in the United Kingdom.
Mexican federal police and migration agents find 136 migrants in a locked truck abandoned near a freeway in Veracruz. Without water or food, the people from the countries of Honduras, Guatemala, El Salvador, and Nicaragua, including dozens of minors, were "en route" to the United States.
A Pew Research Center report finds, from 2009 to 2014, more Mexicans, including unauthorized immigrants, are leaving the United States than entering it. An increasing share of Mexicans says life north of the border is neither better nor worse than life in Mexico.