Vaccines specifically designed to tackle new variants of coronavirus should be ready to be rolled out by October, according to the team behind the Oxford University/AstraZeneca jab.
Professor Andrew Pollard, director of the Oxford vaccine group, said work on designing a new jab could be a quick process.
Studies have shown that variants of COVID-19 that have the E484K mutation could reduce the efficacy of vaccines, but they are still expected to provide good protection against illness and severe disease.
The mutation is present in the variant first identified in South Africa, with more than 100 cases of that variant detected in the UK so far.
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