Lancet MMR vaccine-autism report

On 28 February 1998, a fraudulent research paper primarily authored by physician Andrew Wakefield, along with twelve other coauthors (titled "Ileal-lymphoid-nodular hyperplasia, non-specific colitis, and pervasive developmental disorder in children"), was published in The Lancet, a British medical journal. The paper falsely claimed causative links between the measles, mumps, and rubella (MMR) vaccine and colitis, and between colitis and autism.

Source: Wikipedia — Lancet MMR vaccine-autism report (CC BY-SA 4.0)