A half-million Coloradans have already signed up for the state’s new coronavirus-tracking notification tool

The app, called Exposure Notifications, works only on smartphones, leaving out at least 19% of the state

Coronavirus Primary category in which blog post is published
Coronavirus Primary category in which blog post is published

Gov. Jared Polis begins quarantine after exposure to person with coronavirus

Polis has tested negative for COVID-19 for now, but expects to be retested in the coming days