SARS-Cov-2 Wuhan original resulted in N501Y mutation becoming dominant in Lab mice.
US WA1 variant resulted in KLRS insertion (at spike 215 in NTD) becoming dominant in Deer micce and others, AND very tiny amount of variant with KLRS insert was found in WA1.
So, N501Y variant could be contained in Wuhan original version, maybe.
But I guess WA1 did not contain N501Y minor variant because it could become dominat in Deer mice if it was there.
Also, Wuhan original did not contain KLRS variant, probably.
IF these were true, Wuhan original and US WA1 were somewhat different as far as the minor variants they carried, somehow.
Also, why did they have such minor variants?
How come these minor variants could become reference genome in mice and Deer mice?