The writer is a science commentator
The clean exit from the coronavirus pandemic promised by Covid-19 vaccines has been sullied by the arrival of new variants. Some of these viral newcomers appear to be putting up a fight against the current crop of jabs.
The scramble to update vaccines that have barely been rolled out is now pushing some towards a more ambitious goal: universal “variant-proof” vaccines, able to fend off different varieties of the same virus family.
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