Robert F. Kennedy Jr. has defended a proposed $500 million cut to mRNA vaccine funding, drawing criticism for using scientifically inaccurate and misleading arguments. Experts have pointed out flaws in his understanding of basic immunology concepts, such as antigenic shift, a key mechanism in viral evolution. His stance has reignited debate surrounding vaccine skepticism and the role of misinformation in public health discourse, particularly in light of ongoing efforts to combat vaccine hesitancy.