Evolutionary Ecology Group, University of Antwerp, Antwerp, Belgium.|Centre for Health Economics Research & Modelling Infectious Diseases (CHERMID), Vaccine & Infectious Disease Institute (VAXINFECTIO), University of Antwerp, Antwerp, Belgium.|Centre for Health Economics Research & Modelling Infectious Diseases (CHERMID), Vaccine & Infectious Disease Institute (VAXINFECTIO), University of Antwerp, Antwerp, Belgium.|Evolutionary Ecology Group, University of Antwerp, Antwerp, Belgium.|Evolutionary Ecology Group, University of Antwerp, Antwerp, Belgium.