The Bluesky 'discover' feed today presents a stark juxtaposition of pro-vaccine sentiment and reporting on anti-vaccine rhetoric. A post from Adam Kotsko states unequivocally that "Vaccines are good," and that parental refusal is a societal shame. This is immediately followed by a Mother Jones post highlighting Robert F. Kennedy Jr.'s long history of anti-vaccine activism, despite his lack of medical or scientific training. The continued presence of this discourse, even in the face of overwhelming scientific consensus, demonstrates the long half-life of misinformation on the network. It is a persistent, low-level radiation that continues to expose the network to the risk of renewed outbreaks of discredited ideas.