coronavirus transmission by creating highly accurate mathematical models based on data gathered.Its findings can be used to improve modelling of the virus transmission and to help better predict where and when outbreaks might occur, and bring in measures to prevent them.And it has the potential to provide evidence as to what restrictions could be relaxed further without risking an increase in transmission - vital work.The leading epidemiologist working on the survey, Professor Jonathan Read, has said he doesn't expect normality to be restored by Christmas, which Boris Johnson said he hoped for last month.And Prof Read also warns that it could be several years before we are 'safe from Covid'.Get the latest updates from across Greater.