Correctly folded - but not necessarily functional - influenza virus neuraminidase is required to induce protective antibody responses in mice.
McMahon M, Strohmeier S, Rajendran M, Capuano C, Ellebedy AH, Wilson PC, Krammer F. Correctly folded - but not necessarily functional - influenza virus neuraminidase is required to induce protective antibody responses in mice. Vaccine. 2020 10 21; 38(45):7129-7137.