AI Chatbots Match Social Media in Spreading Vaccine Misinformation

Weekly AI chatbot users endorse vaccine myths at nearly identical rates to social media users—35% versus 37%—according to KFF polling released June 30, 2026. The convergence challenges assumptions that AI systems, trained on clinical literature, would outperform social feeds. The parallel rates suggest the misinformation problem stems not from platform architecture but from underlying information-seeking behavior or the absence of a trusted healthcare provider.