I've said there was no evidence of recent recombination in SARS-CoV-2. That turns out to not be quite right, though it doesn't affect the receptor binding domain. Rather, the S1/S2 cleavage site of SARS-CoV-2 may have been acquired from an HKU9-like virus in the last few decades.https://twitter.com/arambaut/status/1268695688151523329 …
... in a somewhat distant ancestor of SARS-CoV-2 - likely not in SARS-CoV-2 itself (or a highly related 'precursor' virus).
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Can we say how recent other than more recently than the common ancestor with RaTG13 and before November 2019?
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More distant that the common ancestor with RaTG13 - RaTG13 *lost* the RBD, but the ancestor of SARS-CoV-2 and the pangolin CoV likely had it. (this is all Andrew's stuff btw - I haven't actually looked at this question deeply).
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