COVID-19 continues to mutate.Fears are rising over the latest variant, this time discovered in South Africa. COVID-19 variant found in South Africa might be a problem for vaccines, experts warn There is worry among some experts about whether current vaccines will be effective against the variant — called 501Y.V2 — that’s rapidly replacing other strains in the country, but not everyone is convinced.Here’s what we know so far:There are already many different versions, or variants, of COVID-19 circulating in different parts of the world.