As Mu Variant Spreads in U.S., This Is Why Some COVID Mutations Take Hold and Others Don't
http://www.newsweek.com/mu-covid-variant-delta-us-why-do-some-variants-spread-others-dont-1626414
The Mu variant of COVID has made numerous headlines since it was classified as a variant of interest (VOI) by the World Health Organization (WHO) last week, but it does not appear to be taking over the U.S. yet, data shows.
According to the most recent genomic surveillance data published by the Centers for Disease Control and Prevention (CDC), Mu, or B.1.621, accounted for just 0.2 percent of sequenced samples in the country in the week ending August 28.