Apple:

This tool can help you understand what to do next about COVID-19. Let’s all look out for each other by knowing our status, trying not to infect others, and reserving care for those in need. This site was developed in partnership with The Centers for Disease Control and Prevention (CDC).

The site will also have an app to download. There’s not a lot here that isn’t already known but it might be a good resource to have some of this information handy.