hemagglutinin protein

The **hemagglutinin protein** is a key surface glycoprotein found on the influenza virus. It plays a crucial role in the virus’s ability to infect host cells by binding to sialic acid receptors on the surface of respiratory epithelial cells, facilitating viral entry. Due to its central function in viral attachment and entry, hemagglutinin is a primary target for immune responses and vaccine development. Variations and mutations in the hemagglutinin protein contribute to the antigenic drift and shift seen in influenza viruses, influencing their infectivity and the effectiveness of vaccines. This tag is used for posts related to virology, influenza research, immunology, and vaccine studies.