In the 1990s, a national broadcaster aired an investigation into a monkey virus hidden in the polio vaccine given to millions of children.

In the 1990s, a national broadcaster aired an investigation into a monkey virus hidden in the polio vaccine given to millions of children.

A researcher estimated there were "at least 26 different monkey viruses" in those vaccines. When a cancer doctor found one of them inside children’s brain tumors, his words were: "I almost fell out of my chair." 🧵

— A Midwestern Doctor (@MidwesternDoc) October 27, 2026