http://www.newsweek.com/ay-4-2-delta-covid-variant-spike-mutations-y145h-a222v-1642179

The COVID variant AY.4.2, also being referred to as the new "Delta Plus," continues to spread around the world, and scientists are still trying to figure out exactly how it works.

The variant is an offshoot of the COVID Delta variant AY.4., which itself is an offshoot of the original Delta. Scientists know that AY.4.2 is characterized by two mutations in its spike protein—a spike on the surface of the SARS-CoV-2 virus that allows it to enter human cells.