This means users in these 18 areas won’t have to download a separate app in places they are visiting.
A user who tests positive for the virus can have their phone trigger a notification to other people they’ve spent time near.
The states beyond Virginia are Alabama, California, Colorado, Connecticut, Delaware, Maryland, Michigan, Minnesota, Nevada, New Jersey, New York, North Carolina, North Dakota, Pennsylvania, Washington and Wyoming.
Adoption is much higher in these places compared with those that require residents to download distinct app, including North Carolina, North Dakota and Virginia.
Report for America is a nonprofit national service program that places journalists in local newsrooms to report on undercovered issues.