Britain to allow mixing of Covid vaccines on rare occasions January 02, 2021 at 04:44AM

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.