Veteran medical adviser likely to face questions over disputed ‘lab leak’ theory in investigation seen by scientists as ‘vilification and harassment’ of 85-year-old Sign up for US Breaking News email Hello and welcome to the US politics live blog. Senators are expected to question Anthony Fauci, the former veteran director of the National Institute of Allergy and Infectious Diseases (Niaid), about whether the Covid-19 virus began as a “lab leak” in a high-profile hearing later today. Conti...