The protective effect of neuraminidase (NA) was studied in a mouse protection test using isolated neuraminidase of A2/Aichi/68(H3N2) virus and the complete recombinant virus A/eq(Heq-1)-HK(N2) as antigens. Immunized mice were protected against A2/Aichi(H3N2) challenge virus; however, the protection rate was low in comparison to animals immunized with comparable amounts of the complete A2/68(H3N2) virus9 (Reichert and Mauler, 1975).
References
Reichert and Mauler, 1975: Reichert E, Mauler R. Effect of neuraminidase on potency of inactivated influenza virus vaccines in mice. Developments in biological standardization. 1975; 28; 319-323. [PubMed: 1126575].