MISSION, Kan. (AP) — With the U.S. vaccination drive picking up speed and a third formula on the way, states eager to reopen for business are easing coronavirus restrictions despite warnings from health experts that the outbreak is far from over and that moving too quickly could prolong the misery.

Massachusetts on Monday made it much easier to grab dinner and a show. In Missouri, where individual communities get to make the rules, the two biggest metropolitan areas — St. Louis and Kansas City — are relaxing some measures. Iowa's governor recently lifted mask requirements and limits on the num...