There is no retracted paper. Like the GP correctly points out, this is a website designed to pressure another group to retract their paper. The authors of said

There is no retracted paper. Like the GP correctly points out, this is a website designed to pressure another group to retract their paper. The authors of said paper have not retracted it, although there were minor addendums (none of them in response to the website, I hasten to add). The paper in question -- Detection of 2019 novel coronavirus (2019-nCoV) by real-time RT-PCR[1][2] --, was the first paper (as far as I know, one of the first, certainly) outlining a protocol for a PCR test protocol for Sars-CoV-2, back in January 2020. In other words, these were among the first people who documented a way to detect whether a sample represented Sars-CoV-2. The authors have previously published about other coronaviruses like Sars-CoV-1 and MERS, e.g. [3] appears at first glance to be a well received paper. Here's [4] their paper on the detection of Sars-CoV-1 (or, back then, just Sars-CoV) via PCR. [1] https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2020.25.3.2000045 https://www.eurosurveillance.org/content/10.2807/1560-7917.E... [2] https://scholar.google.com/scholar?cites=14452026284756058061&as_sdt=2005&sciodt=0,5&hl=en https://scholar.google.com/scholar?cites=1445202628475605806... [3] https://www.sciencedirect.com/science/article/pii/S0065352718300010 https://www.sciencedirect.com/science/article/pii/S006535271... [4] https://www.eurosurveillance.org/content/10.2807/ese.17.39.20285-en/ https://www.eurosurveillance.org/content/10.2807/ese.17.39.2...