Dozens of countries have banned travel from the UK in an effort to contain a new Covid-19 variant first reported in England. The new mutation is being called VUI-202012/01 — the first "Variant Under Investigation" in the UK in December 2020. Here's what we know so far about the Covid-19 variant:What is a variant and why are officials concerned about this one? A variant occurs when the genetic structure of a virus changes. Public Health England (PHE) says backwards tracing, using genetic evidence, suggests the variant first emerged in England in September.

Source: CNN December 26, 2020 15:15 UTC