AI Chatbots Spread Vaccine Myths as Often as Social Media

Weekly AI chatbot users endorse vaccine myths at roughly the same rate as social media users—35% versus 37%—according to KFF polling released in June 2026. The finding undermines the assumption that AI systems, trained on medical research, would filter misinformation better than social feeds. The parallel rates suggest the real problem lies not in how platforms work, but in how people seek health information and whether they trust their doctors.