MODERATORS: It's been a long time since I started a new post, so please correct whatever mistake I made...
COVID-19 virus detected in a Barcelona sewage sample from back in March 2019.
Link to the study as pre-published in a medical journal.
https://www.medrxiv.org/content/10.1101/2020.06.13.20129627v1.full.pdf"... All samples came out to be negative for the presence of SARS-CoV-2 genomes with the exception of March 12, 2019, in which both IP2 and IP4 target assays were positive.
This striking finding indicates circulation of the virus in Barcelona long before the report of any COVID-19 case worldwide. Barcelona is a business and commerce hub, as well as a popular venue for massive events, gathering visitors from many parts of the world. It is nevertheless likely that similar situations may have occurred in several other parts of the world, with circulation of unnoticed COVID-19 cases in the community..."