https://en.as.com/en/2020/09/15/latest_news/1600196698_232755.html
So, this is her paper. It is relevant that she is hardly a disinterested party in so far as the CCP is concerned. Whenever submitting a paper for publishing, and whenever becoming a reviewer for a paper, you must disclose any potential conflicts of interest. The paper was published on something called zenodo. The site is down at the moment.
The article also summarises the paper's findings:
The first of these states: “The genomic sequence of SARS-CoV-2 is suspiciously similar to that of a bat coronavirus discovered by military laboratories in the Third Military Medical University (Chongqing, China) and the Research Institute for Medicine of Nanjing Command (Nanjing, China.”
The second line of evidence presented goes on to say: “The receptor-binding motif (RBM) within the Spike protein of SARS-CoV-2, which determines the host specificity of the virus, resembles that of SARS-CoV from the 2003 epidemic in a suspicious manner. Genomic evidence suggests that the RBM has been genetically manipulated.”
The third finding laid out by Yan and her team states: “SARS-CoV-2 contains a unique furin-cleavage site in its Spike protein, which is known to greatly enhance viral infectivity and cell tropism. Yet, this cleavage site is completely absent in this particular class of coronaviruses found in nature. In addition, rare codons associated with this additional sequence suggest the strong possibility that this furin-cleavage site is not the product of natural evolution and could have been inserted into the SARS-CoV-2 genome artificially by techniques other than simple serial passage or multi-strain recombination events inside co-infected tissue cultures or animals.”
I don't have the scientific training to evaluate these claims critically. I suspect nobody in this thread does.
Here's an earlier paper on the origins of Sars Cov 2
https://www.nature.com/articles/s41591-020-0820-9
The big claim made in this first paper, that I'm unsure how this new paper gets around is this:
''However, the genetic data irrefutably show that SARS-CoV-2 is not derived from any previously used virus backbone''