Nauta, J. ., W. E. . Beyer, and E. P. . Kimp. “Toward a Better Understanding of the Relationship Between Influenza Vaccine Efficacy Against Specific and Non-Specific Endpoints and Vaccine Efficacy Against Influenza Infection”. Epidemiology, Biostatistics, and Public Health, vol. 14, no. 4, Mar. 2022, doi:10.2427/12367.