Thirteen years ago, Andrew Wakefield, a British doctor, published an article linking the Measles, Mumps and Rubella vaccine to autism.
This caused a drop in the number of children vaccinated, and put many more at risk to measles, mumps and rubella.
Now, after a lengthy investigation, the British Medical Journal says Wakefield's report has been discredited. He has been stripped of his medical licence and is being called a fraud.
Al Jazeera's Alan Fisher reports.
Source: Al Jazeera