Reasons why Covid variant could kill more people are uncertain

Whatever the answer, everyone has to try even harder not to catch it in the first placeCoronavirus – latest updatesSee all our coronavirus coverageThose who may have been comforted in recent weeks by the evolutionary theory of virus mutation – that the more transmissible they become, the less lethal they are – may now be pondering the news that the variant that originated in Kent not only spreads more easily but may kill more people too.Britain’s chief scientific adviser,