Prof. Dr. Vidarsson is a principal investigator at the Department of Experimental Immunohematology, head of Immunoglobulin Research laboratory at Sanquin Research and a professor of Immunoglobulin Biopharmaceutics at the Department of Pharmaceutical Sciences at Utrecht University in the Netherlands. He studied molecular biology in Iceland, completed his PhD from University of Utrecht in 2000. Since then, he completed a post doc at the Dutch Vaccine Institute and Sanquin Research in Amsterdam, where he was appointed a senior researcher in 2006. In 2014 he was appointed as principal investigator at both Sanquin Research and Amsterdam University Medical Centre. Since 2022, besides his PI function at Sanquin, he became a professor at Utrecht University. His work focuses on humoral Immune responses emphasizing on antibody biology in humans. This includes work on Fc-receptors, complement and glycosylation of IgG where he studies its significance in human immune responses. According to Google scholar, his work has been cited >11000 times yielding a h-index of 53, with 122 papers cited more than 10 times in the last 5 years.