The delta variant now makes up an estimated 83% of coronavirus cases in the U.S., a sharp increase over recent weeks. Cases are rising more rapidly in places with low rates of vaccination. Arkansas is one of those places. The state's Republican governor, Asa Hutchinson, tells NPR what he's doing to try to convince more people to get a shot. Amid those localized surges and reports of breakthrough infections, NPR's Alison Aubrey explains how to think about your own risk. Find more NPR coverage of breakthrough infections here. In participating regions, you'll also hear a local news segment that will help you make sense of what's going on in your community.Email us at considerthis@npr.org.