Birger Trollfors graduated from the Medical Faculty in Gothenburg in 1974. After that he immediately started working at the Department of Infectious Diseases in Gothenburg, where he became a specialist in Imfectious Diseases. He also got a diploma in Parasitology and Tropical Diseases at the Bernhard Nocht Institute in Hamburg, Germany. After 10 years in Gotheburg he worked with a new acellular pertussis vaccine at the US Natuional Insitutes of Health in Bethesda, Maryland. When coming home to Gothenburg he led a double-blid placebo controlled trial of this pertussis vaccine. When the trial was over he started working at the Department of Pediatrics in Gothenburg, where he has stayed. He has published more than 200 original articles in peer-reviewed journals and supervised 12 young physicians to their dissertation. His research has mainly been devoted to vaccines and vaccine-preventable diseases notably, pertussis, pneumocacci and Hib. His clinical work has for the last 15 years been devoted to immigarnt patients with latent and active tuberculosis.