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.
Cabbage, cavemen and miracle cures: how fast-moving COVID-19 science can confuse the public “(If) the same vaccine is not available, or if the first product received is unknown, it is reasonable to offer one dose of the locally available product to complete the schedule,” according to the guidelines.Mary Ramsay, head of immunisations at.