As some states open Covid-19 vaccines to all, many others are still weeks away. Here's a timeline.

John McGee, 21, told CNN on Tuesday that he was mindlessly scrolling through Twitter last Monday when he saw Mississippi Gov. Tate Reeves' post: 'Starting tomorrow, ALL new appointments will be open to ALL Mississippians. Get your shot friends - and let's get back to normal!' Mississippi is 1 of 5 states that have expanded coronavirus vaccine eligibility to anyone 16 and older, and a CNN analysis finds that at least 20 more plan to open up to people 16 and older by the end of April. Alaska was the first state in the US to stop prioritizing certain groups for Covid-19 vaccines and open vaccination appointments to everyone 16 and older who lives or works in the state.