As several countries grapple with new, dangerous Covid strains, Oxford scientists are preparing to rapidly produce new versions of their vaccine to combat the new virus variant, The Telegraph reported on Wednesday. New, more infectious variants of Covid-19 have emerged in the UK, South Africa and Brazil, and have spread to many parts of the world. The team behind the vaccine from Oxford and AstraZeneca is undertaking feasibility studies to reconfigure the technology, the newspaper said. British Prime Minister Boris Johnson said on Wednesday that the nation's medicines regulator will be ready and able to give approval to new versions of Covid-19 vaccines designed to counter new variants of the coronavirus that may appear.