Chinese surnames pronounced 'Mu' are similarly common to 'Xi'. There is a Mu variant of Covid[0] [0] https://en.wikipedia.org/wiki/SARS-CoV-2_Mu_variant https

Chinese surnames pronounced 'Mu' are similarly common to 'Xi'. There is a Mu variant of Covid[0] [0] https://en.wikipedia.org/wiki/SARS-CoV-2_Mu_variant https://en.wikipedia.org/wiki/SARS-CoV-2_Mu_variant