We cover this quite extensively in our book. I also have a manuscript that will soon be in peer review describing the relationship between SARS-CoV-2 and other known viruses. None of the publicly disclosed viruses could have plausibly been the progenitor of SARS-CoV-2.
However we now know that when news emerged of a novel SARSrCoV with a novel cleavage site causing an outbreak in Wuhan… scientists in Wuhan did not tell us that they were working with 9 of its closest relatives, linked to mysterious pneumonia cases, and that they had been collecting 1,000s of unpublished high-risk samples from animals & humans across 8 countries, with a clear roadmap for synthesizing consensus SARSrCoV genomes and inserting novel cleavage sites into novel SARSrCoVs. Their database meant to inform pandemic prediction & response remains inaccessible.
However we now know that when news emerged of a novel SARSrCoV with a novel cleavage site causing an outbreak in Wuhan… scientists in Wuhan did not tell us that they were working with 9 of its closest relatives, linked to mysterious pneumonia cases, and that they had been collecting 1,000s of unpublished high-risk samples from animals & humans across 8 countries, with a clear roadmap for synthesizing consensus SARSrCoV genomes and inserting novel cleavage sites into novel SARSrCoVs. Their database meant to inform pandemic prediction & response remains inaccessible.