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Britain will allow mixing of COVID-19 vaccines on rare occasions
Britain will allow people to be given shots of different COVID-19 vaccines on rare occasions, despite a lack of evidence about the extent of immunity offered by mixing doses.In a departure from other strategies globally, the government said people could be given a mix-and-match of two COVID-19 shots, for example if the same vaccine dose was out of stock, according to guidelines published on New Year's Eve.