[1][2] According to the Journal of Immunology, "Jules (Julius) Freund studied in Budapest at the Royal Hungarian University.
at the age of 23, he served as Medical Interne in the Austrian Army (1913–1914) and was attached to the Department of Hygiene at the University as Assistant.
He held the post of assistant professor in Preventive Medicine, earning the Certificate of Public Health in 1920.
"[3] In 1942, Jules Freund and Katherine McDermott published a paper on their experiments on immunization of guinea pigs with horse serum containing killed tubercle bacilli and adjuvant.
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