https://quillette.com/2020/04/14/searching-for-a-covid-19-test-in-america/

The author describes the process involved in actively trying to get tested for the disease, given symptoms and history.

The upshot is: we have some idea of the mortality figures for this disease in the US (although there are indications that there are many uncounted deaths of people who never make it into a hospital). We have a very much more approximate idea of infection rates, because we aren’t testing people in a comprehensive way.

Until these two numbers are nailed down within an acceptable range of error, and we can surgically test everyone following contact tracing paths on demand, relaxing the worst-case self-isolation instructions seems like a huge gamble with people’s lives. As a heuristic, I’ve been assigning a confidence level based on the ratio of the two being in the range of 2% or so, based on mortality rates from other parts of the Western world and the more reliable mortality numbers. I see no evidence that either of these numbers can be trusted for the foreseeable future, so I don’t expect to be out of self-isolation anytime soon.