covid is most likely from the US.

Cambridge Coronavirus Study - shows variant of covid found in China is newer ones found elsewhere https://web.archive.org/web/20200410111500/https://www.cam.ac.uk/research/news/covid-19-genetic-network-analysis-provides-snapshot-of-pandemic-origins

https://www.youtube.com/results?search_query=outbreak+fairfax+county

Italy Antibody for SARS-CoV-2 was found in blood samples collected in October 2019 in Northern Italy, implying that community spread had already happened in Italy weeks before the Wuhan Military Games. 14% positivity rate for samples taken in September, 2019 Italy:

Oropharyngeal Swab sample collected on Dec 5 2019 returned positive when tested using PCR test kit

USA

Blood samples collected in the west coast of USA within the Dec 13 to 16 2019 period tested positive for COVID-19 antibody. 2 percent of these blood samples were positive

https://www.northjersey.com/story/news/essex/belleville/2020/04/30/belleville-nj-mayor-tests-positive-coronavirus-antibodies/3057925001/

https://www.youtube.com/results?search_query=outbreak+fairfax+county

France:

A sample collected on Dec 27 2019 in France tested positive for the virus. The patient had no travel history

CT scans of November 2019 patients showed lung profiles resembling those of COVID patients

Spain:

Coronavirus traces found in March 2019 sewage sample, Spanish study shows Study here: https://pubmed.ncbi.nlm.nih.gov/32425251/