https://www.techdirt.com/articles/20200410/13414544274/apple-google-join-forces-to-create-free-tools-coronavirus-tracking.shtml

Fortunately, the US government hasn't decided (yet!) to opt everyone into some sort of tracking program to mitigate the spread of the coronavirus. This doesn't mean you can't opt yourself into tracking to head off possible infections and/or gauge your risk level.

Apple and Google are working together to build a set of tools that can be used to track the spread of the virus, and it's all purely voluntary. Obviously, there are some concerning aspects about the use of these tools by public health agencies, but the companies have done a pretty good job lowering the risk of these being turned into always-on surveillance apps.