Still the transposition of an entire key functional unit (the SPIKE PROTEIN on which viral propagation 100% depends) from Human Immunodeficiency Virus-1 inside a bat strikes me as extremely unlikely. We are talking about a virus totally switching from one "entry" protein to another in a single generation. It is vanishingly unlikely.
Meanwhile, it would be trivial to achieve in a laboratory (like that one across the street.) and is kind of an obvious experiment. I could literally make you something similar with access. A twelve-year-old could, with the right technical manuals and gear.
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