With each variant of COVID-19, you also get sub-variants. The best example of this is the ‘Delta-Plus’ strain that followed the previous wave of infections. Now, history is repeating itself with Omicron – but this time, the ‘mutation within a mutation’ is threatening to outgrow the original variant. Omicron mutation in South Africa: What does it mean?The BA.2 lineage of Omicron is now outpacing the BA.1 strain, that swept across the globe so rapidly at the back end of 2021. Although not classed as a ‘new variant’, this latest mutation may have a slight transmission advantage over its predecess…