After the war he resumed his work at Levi 's laboratory .
Soon he moved , together with Levi - Montalcini , to the U.S. , where , at Indiana University , he worked with Salvador Luria on bacteriophages .
After the war he resumed his work at Levi 's laboratory , but soon he moved , together with Levi - Montalcini , to the U.S. , where , at Indiana University , he worked with Salvador Luria on bacteriophages .