Ask HN: Is anyone working on Covid tracking tech?
At the very least, a mobile app that tracks your location history over the last 2-3 weeks would be helpful. Even if the data is just stored locally, perhaps eventually overlaid onto a map for reference, that would be helpful if you test positive, because then you have a way to review it and clearly indicate where you've been when, to report to authorities that might want to contact-trace or alert communities. ("A covid case was at your local Safeway between 7:14 and 8 pm on the 23rd.")
More spruced up is something where location history is submitted through a central service so that people could be automatically informed if there's an overlap. A while back I was working on an Akka Cluster Sharding app that did something similar, but it wasn't for pandemics. It'd only be valuable if a critical mass of people were using it though, which might mean it'd have to be a government or big-corp effort.