However, researchers are working to develop universal vaccines that could protect against multiple flu strains without needing to be updated. (sciencedaily.com)
But experts have speculated that antibodies against one type of neuraminidase could provide protection against multiple flu viruses sharing the same NA type. (scientificamerican.com)
«Key benefits of large - scale use of universal over conventional flu vaccines: Mathematical model reveals potential effects of new vaccines that target multiple flu strains.» (sciencedaily.com)