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Why more contagious Covid-19 variants are emerging

New variants of SARS-CoV-2 have now evaded New Zealand’s border protections twice to spread into the community. In the most recent outbreak, which placed Auckland into an alert level 3 lockdown for three days, there were active community cases of the more infectious B.1.1.7 lineage.While we have seen the virus mutate over the entire course of the pandemic, it was not until mid-December 2020 that variants with measurably different behaviour emerged.There are several reasons for this, including…

Read the original article at South China Morning Post

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