http://www.newsweek.com/delta-ay4-2-covid-variant-how-worried-concerned-should-we-transmissible-1641191

Data is slowly but increasingly suggesting that the COVID AY.4.2 variant has a growth advantage over other Delta types, according to a genomics expert.

AY.4.2 is an evolution of the Delta AY.4 variant, the latter of which has been widely detected around the world, particularly in the United Kingdom.