In the weeks before China reported its first case in 2019, COVID was discovered in the United States. The study may spark debate about the origin of the pandemic. About a year after the coronavirus changed the concept of normal phenomena known to humans so far, recently A study by has now found that Covid-19 infection occurred in the United States dating back to December 2019. The study provides further evidence that the first case of the coronavirus has spread globally a few weeks ago in China. The coronavirus spread silently around the world earlier than the known time.