IE 11 is not supported. For an optimal experience visit our site on another browser.

MAP: See which states are doing away with appointments for the vaccine

Walk-in vaccinations are now available in spots across the country.

After a rollout characterized by overloaded and sometimes hard-to-use systems, the U.S. appears to be entering a new phase: appointment-less Covid-19 vaccinations.

Walk-ins are typically first come, first served and usually for first doses only, except for sites offering the Johnson & Johnson vaccine (which doesn’t require a second dose).

As traffic to mass vaccination sites slows, many states, such as New York, New Jersey, Connecticut, Maryland and Florida, have begun to offer vaccinations without needing an appointment at some of their state-run sites, according to an NBC News analysis.

See which states and jurisdictions have started offering walk-in appointments using the interactive map below.

NBC News is publishing a vaccination guide: Plan Your Vaccine.

Kanwal Syed, JaJuan Morris-Guity, Megan Watkins and Bentley Maddox contributed.