Senate Democrats strongly criticized Health and Human Services Secretary Robert F. Kennedy Jr. for his stance on vaccine safety and effectiveness. They accused him of creating confusion and eroding vaccine access since taking office. A collective statement from Democrats on the Senate Finance Committee and Senator Bernie Sanders called for Kennedy's resignation. They argued he has failed to protect the American people's health. During questioning, Senator Michael Bennet emphasized the seriousness of public health decisions, contrasting them with informal discussions. Kennedy defended the transparency of vaccine data, which Senator Maria Cantwell disputed, labeling him a "charlatan." Senator Mark Warner expressed disbelief at Kennedy's admitted ignorance of COVID-19 death tolls and vaccine efficacy. Kennedy also engaged in a heated exchange with Senator Maggie Hassan over COVID vaccine policies and transparency. Republican Senator Bill Cassidy, who confirmed Kennedy, questioned the inconsistency between his praise for Operation Warp Speed and his actions regarding vaccine funding. Cassidy concluded that Kennedy's decisions effectively deny people access to vaccines. Kennedy has implemented significant changes to vaccine policy and appointed individuals with anti-vaccine views to advisory panels.