 Back in the east in 1935, he worked as a bacteriologist and serologist at Newark Beth Israel Hospital, New Jersey where, in 1939, Levine and Rufus E. Stetson published their findings about a family who had a stillborn baby in 1937 who had died of hemolytic disease of the newborn.This publication included the first suggestion that a mother could make blood group antibodies owing to immune sensitization to her fetus's red blood cells.In 1944 Levine started a centre for blood group research at the Ortho Research Foundation, Raritan, New Jersey.