coronavirus and say they have uncovered 17 alterations from the original strain of the killer disease, which they described as "a lot".Many of the changes have happened to the virus's spike protein, which it uses to latch onto human cells and cause illness.This is significant because most Covid-19 vaccines being developed, including the Pfizer jab that has already begun to be rolled out in the UK, are effective by targeting this protein.It is feared this could stop people becoming immune to coronavirus if they have been infected with a different strain than the vaccine can protect them against.Scientists including England's chief medical officer Chris Whitty have said there is "currently no evidence" that the new variant will stop the.