Simplify the following text for a Grade 14 native English-speaking person.
Original: MÃ 1\/4 ller , described as the `` forgotten father of experimental epidemiology '' , was a member of the National Socialist Motor Corps ( NSKK ) and the National Socialist German Workersâ Party ( NSDAP ) .
Simplified: MÃ 1\/4 ller , described as the `` forgotten father of experimental epidemiology '' , was a member of the National Socialist Motor Corps ( NSKK ) and the Nazi Party ( NSDAP ) .