Complex sentence: A modern and notable example involved Andrew Wakefield's discredited assertion of MMR vaccines causing autism, which, in 2011, was described as "perhaps, the most damaging medical hoax of the last 100 years".
Split into simpler sentences: A modern and notable example involved Andrew Wakefield's discredited claims of MMR vaccines causing autism. In 2011, the vaccine-autism connection was described as "perhaps, the most damaging medical hoax of the last 100 years".