A team of investigators in South Korea has conducted research to evaluate the effects of air pollution on disease activity and flare occurrence in patients with established RA and explore its underlying mechanisms. Considering rising levels of air pollutants, these results have significant clinical, biologic, and public health implications. They also further reinforce that inhalants may have broad implications for risk and progression of RA and perhaps other autoimmune diseases. From a clinical perspective, this may offer avenues to lower the risk of RA flares by avoiding air with poor quality and provide some potential explanation for otherwise idiosyncratic RA flares.” This prospective cohort study tracked 1,070 RA patients across 12,583 real-world outpatient visits over four years (2021–2024) at a major South Korean medical center.