Abstract Mutational changes that mostly occur at the head region of hemagglutinin (HA) lead to the emergence of new epidemic influenza viruses. whereas HA antigens have been modified to generate broadly neutralizing antibodies toward highly conserved epitopes in the HA stem. Interestingly. a recent analysis of serum antibody repertoires showed that broadly neutralizing antibodies bind... https://macorners.shop/product-category/metal-sign/