Oh, please. There are plenty of confirmed cases of COVID-19 (confirmed by serological testing for the virus itself) that have responded well to a number of treatments.

If you were to say that there is no generally approved treatment protocol (i.e., a guideline that all health organizations agree upon), that would be true. Individual health care providers are having to develop treatment regimes on their own at this point. But the claim you made was much stronger than that.

> Name one treatment that is used for a person with a positive covid test that would be in any respect different from someone with the same symptoms and no test.

Without any test at all you don't even know if the person's respiratory illness is bacterial or viral, so you don't know whether or not antibiotics are indicated.

If you have tested to rule out bacterial infection, that still leaves different possible viral illnesses that have different expected responses to different antiviral drugs, so you need to test further to know which drug is the most likely to help.

For COVID-19 there is also HCL thrown into the mix.