Eventually, despite Trump, we will have enough testing to do effective contact tracing. But we don't have anything set up to do it. It'd take a lot of people, and some organisation, and funding. I know, there isn't a chance Trump will do any of that.
But we could automate it.
No, that won't happen under Trump, either. The Cult wouldn't like it. But Biden might, and that would give us a big stick with which we could beat that damn virus.