Thanks to technology on Apple and Google phones, you can now get notifications in some states if you were close to someone who later tested positive for COVID-19.
The app tracks user's locations through Bluetooth and if someone using the app tests positive for the COVID-19, it tracks all phones that came within six feet of the user for at least 15 minutes, over the last two weeks.
The app would then notify those users, telling them to quarantine and get tested.
Millions have already signed up for the system in 15 states, including Alabama, Colorado, Connecticut, Delaware, Michigan, Minnesota, Maryland, Nevada, New Jersey, New York, North Carolina, North Dakota, Pennsylvania, Virginia, Wyoming and the nation's capital, Washington, DC.
Other states, including California and Oregon, have launched pilot programs but their notification systems are not yet available to everyone.