Hasselt University, Interuniversity Institute for Biostatistics and statistical Bioinformatics (IBioStat) - Data Science Institute, Hasselt University, Marshfield Clinic Research Institute, Marshfield Clinic Research Institute, Government of the United States of America - Influenza Division, Centers for Disease Control and Prevention, Centers for Disease Control and Prevention, Centers for Disease Control and Prevention, Vanderbilt University - Medical Center, Vanderbilt University - Medical Center, Vanderbilt University - Medical Center and Vanderbilt University - Medical Center