coronavirus cases, according to a former director at the World Health OrganisationEx-WHO expert Anthony Costello tweeted: "I'm hearing from a well-connected person that government now thinks, in absence of testing, there are 38,000 infections per day."Chris Whitty is advising PM for a two week national lockdown."However, health minister Edward Argar has denied the claims."It is not something I have seen within the department," he told Sky News."The Prime Minister has been very clear on this.