 Kunyora kupfuurira kweiyi ndima - Pashure pokusungwa, pamwe chete navanakomana vake vaviri, pausiku hwekupinda kweGermany muAustriaMusi waMarch 11, 1938, Loewi akasunungurwa pashure pemwedzi mitatu pasi pemamiriro ekuti anozvidira kurega zvinhu zvake zvose, kusanganisira tsvakurudzo yake, kuvaNazi. Akatanga kuenda kuBritain uye pasina nguva refu akabva apiwa basa rokushanyira purofesa paUniversité libre de Bruxelles kuburikidza neFranqui Foundation. Loewi akatamira kuUnited States muna 1940, kwaakava purofesa wekutsvakurudza paNew York University College of Medicine. Muna 1946, akava mugari wemo weUnited States. Muna 1954, akava Nhengo Yokune Dzimwe Nyika yeRoyal Society. Akafira muNew York City pana December 25, 1961. 