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            _____    ______      ___      _  _   
  ____     |  ___|| |      \\   / _ \\   | \| || 
 |    \\   | ||__   |  --  //  / //\ \\  |  ' || 
 | [] ||   | ||__   |  --  \\ |  ___  || | .  || 
 |  __//   |_____|| |______// |_||  |_|| |_|\_|| 
 |_|`-`    `-----`  `------`  `-`   `-`  `-` -`  
 `-`

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Text this: The polybasic insert, the RBD of the SARS-CoV-2 spike protein, and the feline coronavirus – evolved or yet to evolve