CDC weighs tightening COVID test requirement for international travelers
The Centers for Disease Control and Prevention may tighten COVID-19 testing requirements for travelers coming into the U.S. with cases of the Omicron variant reported in at least 20 countries and territories. "CBS Mornings" lead national correspondent David Begnaud reports how scientists are working to understand the new strain, and Dr. Susannah Hills, a pediatric airway surgeon and assistant professor at Columbia University Medical Center, joins CBSN to discuss the latest on the pandemic.