Dominic Cummings has accused Matt Hancock's of lying with his claim that the government never intend to pursue a strategy of herd immunity to fight coronavirus, in his latest Twitter post before he gives evidence to MPs on Wednesday. He insisted Health Secretary Mr Hancock lied when he claimed herd immunity 'wasn’t the plan'. Herd immunity is a strategy for fighting pandemics which aims to allow enough non-vulnerable people to catch the virus that transmission in the community stops. But how "herd immunity by September" could have been the plan until that week is a fundamental issue in the whole disaster.' Herd immunity is not a part of it.'