Stricter travel rules begin as US cases climb; J&J vaccine works well as mix-and-match booster, study says: COVID-19 updates

International travelers arriving to the U.S. face stricter rules. Study says Johnson & Johnson vaccine serves as an effective booster. Live updates.

     

from USATODAY - News Top Stories https://www.usatoday.com/story/news/health/2021/12/06/omicron-covid-variant-travel-rules-booster-vaccinations/8881566002/