Expres2ion Biotech Holding AB engages in the development of a portfolio of vaccines for diseases such as COVID-19, influenza, and breast cancer. Its products and services include custom made proteins and reagents; transfection reagent; process development; feasibility studies; and licensing. The company was founded by Charlotte Dyring, Wian de Jongh, and Martin Roland Jensen in 2010 and is headquartered in Hørsholm, Denmark.