is good, but is encouraging news and they are not very clear yet on how much that risk is reduced and we do know with omicron that it does spread a lot more quickly, it is a lot more infectious than deltas or any advantage gained from a reduced risk of hospitalisation needs to be set against that and we know for example that if a much smaller percentage of people are at the risk of hospitalisation, that a smaller percentage of a much larger number that could still be significant in hospitalisations. britain may follow israel and germany in approving the roll out of a fourth covid 19 vaccine. thejoint committee on vaccination and immunisation will look at data on protection from three jabs and hospitalisation from the new omicron variant before making a decision on a second booster. with me now is proffessor adam finn from the university of bristol and member of thejoint committee of vaccination and immunisation.