Ka cika wannan jumla: A lokacin Nazi Jamus
A lokacin mamayar Poland a yakin duniya na biyu, binciken Weigl ya jawo hankalin 'yan Nazi. Lokacin da suka mamaye Lviv, sun umurce shi da ya kafa masana'antar samar da maganin typhus a Cibiyarsa. Weigl ya hayar da wasu abokan Yahudawa da kwalejoji a masana'antar samarwa. Kimanin mutane dubu ne suka yi aiki a wurin. Weigl ya yi aiki da kuma kare masana ilimi na Poland, yahudawa da membobin karkashin kasa na Poland. Da yawa daga cikin mutanen da ya ɗauka sun taimaka masa a bincikensa na typhus da gwaje-gwajen da ya yi da kuraje. Yawancin abokansa na yahudawa sun taimaka da farko sun taimaka wajen ciyar da kuraje kuma a dawo, sun sami abinci, kariya, da allurai na allurar rigakafi lokacin da aka kammala. An shigar da allurar rigakafinsa cikin ɓoye cikin ghettos a Lviv da Warsaw, sansanonin taro dabam dabam, har ma da wasu kurkukun Gestapo. An kiyasta cewa Weigl ya sami damar ceton rayuka 5,000 a lokacin mulkin Nazi. Daga baya Soviet Union ta rufe cibiyarsa bayan farmakin da suka yi a kan Jamus a shekarar 1944.