Longitudinal study of the immune response and memory following natural bovine respiratory syncytial virus infections in cattle of different age. oleh Sara Hägglund, Katarina Näslund, Anna Svensson, Cecilia Lefverman, Hakan Enül, Leonore Pascal, Jari Siltenius, Menno Holzhauer, Alexis Delabouglise, Julia Österberg, Karin Alvåsen, Ulf Olsson, Jean-François Eléouët, Sabine Riffault, Geraldine Taylor, María Jose Rodriguez, Marga Garcia Duran, Jean François Valarcher