==External links==* Biography of Weigl (1967) by Stefan Kryński* Page with many Weigl links and pictures* Overview of the experiment--"Maintenance of human-fed live lice in the laboratory and production of Weigl's exanthematous typhus vaccine" (1999) by Wacław Szybalski* "Ann.
* Biography of Weigl (1967) by Stefan Kryński* Page with many Weigl links and pictures* Overview of the experiment--"Maintenance of human-fed live lice in the laboratory and production of Weigl’s exanthematous typhus vaccine" (1999) by Wacław Szybalski* "Ann.