Recent study led to development of a new vaccine which is capable of fighting many types of influenza. This study was done by the National Institute of Infectious Diseases, Hokkaido University, Saitama Medical University and chemical maker NOF Corp.
Present vaccines target proteins that look like barbs covering the outer surface of the virus. But the problem is that these proteins can quickly change their shape and moreover several strains of influenza have differently shaped proteins. Hence new vaccines need to be developed every year.