Update. The Cleveland Clinic has developed a COVID 19 test that gives results in 8 hours as opposed to the 2-3 days it takes for the other tests.
They developed the test in NINE days, I repeat nine. Scientists worked 24/7 once the CDC gave them the okay on 3/2.

— Andrea R MD, @andrear9md.bsky.social (@AndreaR9Md) March 11, 2020