Klingberg lived in a one-room apartment in Paris, but did not take French citizenship. He frequently lectured on medicine at universities. He helped establish the Ludwik Fleck Center of the Collegium Helveticum - a university center in Zürich, and delivered the opening lecture. As a former Lieutenant Colonel in the IDF, he received an officer's pension from the Israeli government, which in France amounted to around € 2,000 a month. Klingberg continued to have medical problems after his release, and was frequently hospitalized. He continued to take an interest in events in Israel, and read Hebrew newspapers.