Stephen Colbert is not impressed that Robert F. Kennedy Jr. has cut $500 million in funding for vaccines. On the latest episode of The Late Show, Colbert took aim at the Health and Human Services Secretary over the decision, which former Surgeon General Jerome Adams said “is going to cost lives.”

Although mRNA vaccines saved millions of lives during the COVID-19 pandemic, U.S. Health Secretary Robert F. Kennedy Jr. incorrectly argued they are ineffective to justify the Department of Health and Human Service’s recent decision to cancel $500 million in government-funded research projects to develop new vaccines using the technology.