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This is positive news as it shows that just one dose of this vaccine generates good levels of immunity and that this protection does not seem to wane in the shorter term, in immunology terms, this finding is not unexpected as we know that some other vaccines confer better immunity when the doses are more spread out. Although further information is required to confirm these findings for older age groups, overall this new research should provide reassurance around the UK's decision to offer the two doses of this vaccine 12 weeks apart.