Researchers from across the world have been tracing the spread of the coronavirus through waste water and sewage finding genetic traces from Brisbane to Paris and Amsterdam. The virus was present in Milan and Turin in December of last year. This was about the first time it was first reported in China
https://news.yahoo.com/virus-already-italy-december-waste-water-study-finds-091612239.html
If it originated in the Chinese wildlife trade then it may have already been well established in the EU because of the wildlife trade:
https://www.dw.com/en/europe-a-silent-hub-of-illegal-wildlife-trade/a-37183459
https://news.yahoo.com/virus-already-italy-december-waste-water-study-finds-091612239.html
If it originated in the Chinese wildlife trade then it may have already been well established in the EU because of the wildlife trade:
https://www.dw.com/en/europe-a-silent-hub-of-illegal-wildlife-trade/a-37183459