Stig Gunnar Olof Johansson (born 1938 in Mora, Sweden), professionally often abbreviated S. G. O. Johansson, is a Swedish immunologist.
[1] He is credited, along with Ishizaka's team,[2] and Hans Bennich [sv],[3] for the discovery of immunoglobulin E (IgE),[4] a kind of antibody or immunoglobulin that mediates immunity to parasites and also has an essential role in type I hypersensitivity and allergic diseases.
Their joint paper was published in April 1969.
[1][6] Later in 1968, he finished his remaining courses in medical school and earned his medical degree.
[6] In 1980, Johansson became a professor in clinical immunology at Karolinska Institute.