Back in the day; "Mar 6, 2020 — The Trump administration's decision to forgo a World Health Organization test and create its own had fateful consequences, experts say." (Politico.com) My local Hospital was- like many in the USA at the time unable to acquire covid tests. So they developed their own PCR in house- They probably had a head start, but they had a product in the 3rd week of March 2020. https://www.desmoinesregister.com/story/news/2020/03/25/uihc-becomes-first-hospital-iowa-test-covid-19-its-own-laboratory/2910266001/ (published March 25, 2020) We live in an amazing time. The creation and roll out of the vaccines was unprecedented.