Patrick Vallance, the former chief scientific advisor to Boris Johnson, testified at the UK’s public inquiry into the COVID-19 pandemic on Monday. During his testimony, he stated that Johnson struggled to understand much of the science during his time as Prime Minister. Vallance explained that he and others encountered repeated difficulties in getting Johnson to comprehend the science, but also noted that leaders in many countries faced similar problems in understanding scientific evidence and advice. Despite this, Vallance emphasized that there were positive aspects to working with Johnson and that he was grateful for his support during some of the most challenging times of the pandemic. The inquiry is scheduled to continue before Christmas, with former Prime Minister Boris Johnson expected to address it before then.