Hundreds of thousands of Britons remain vulnerable to Covid because they have not responded to the vaccines. A drug exists which could protect them. Called Evusheld, the medicine has been rolled out in dozens of countries including the US and France. However, the UK Government refuses to fund it. This week, The Mail on Sunday launches a vital campaign to provide Britain's most vulnerable with Evusheld. The Medical Minefield team speak to Imogen Dempsey, who has been shielding since the beginning of the pandemic and desperately needs Evusheld to return to her normal life. Meanwhile, Lord Andrew Lansley, former Secretary of Health, explains why he has lobbied ministers for months to fund the drug.