*Eligible only in some counties. Data is as of Jan. 14. Sources: State and county health departments. The changing vaccine rollout in many states, which matches a new federal appeal this week that all people over 65 — not just those in long-term care facilities — should be prioritized, was embraced by many older people, who have been the most vulnerable to Covid-19 and have been waiting eagerly for vaccinations and a return to normal life. But the sudden availability to so many more people also caused a deluge of problems as people tried to figure out whether their state was now allowing them to get shots, how to sign up, and where to go.