Covid: BA4 and BA5 symptoms, infection rate, and vaccine efficiency
Covid: BA4 and BA5 symptoms, infection rate, and vaccine efficiency
There are two new subvariants of the Covid variant Omicron – causing Covid cases to rise (Picture: Getty)
Covid-19 case numbers are rising again, in part due to two Omicron subvariants – BA4 and BA5.
These mutations, first found in South Africa in January and February 2022, were labelled as ‘variants of conern’ by the European Centre for Disease Prevention (ECDC) and Control in mid-May.
The UK…
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