Covid-19 predates the United States thinking as early as a few weeks in the United States, and before China has no public case, researchers including (CDC) and American Red Cross scientists have found evidence that Covid-19 was in 2019It appeared in the United States in December 2015, a few weeks earlier than previously thought.
https://www.forbes.com/sites/roberthart/2020/12/01/study-suggests-covid-19-was-in-the-us-weeks-earlier-than-thought-before-first-public-cases-in-china/?sh=107479b74bf8