#MiasmaTheory

A resurgence of ancient medical ideas is reshaping public health discourse in unexpected ways, as evidenced by recent moves in the United States under Health Secretary Robert F. Kennedy Jr. Drawing on the centuries-old miasma theory—which proposes that diseases arise from “bad air” or pollution—Kennedy has implemented policies and made public statements that challenge the contemporary scientific consensus around vaccines. The revival of this long-discredited framework echoes far beyond American borders, offering important lessons for Thailand as it contends with its own vaccine hesitancy and public health challenges (NPR).