The influenza virus is studded with the hemagglutinin (HA) molecule that acts like a molecular hook to latch on to vulnerable cells in our airways and lungs. Hemagglutinin is the principal antigen ...

This hook-like molecule, called hemagglutinin, is the principal antigen in the influenza vaccine. The standard flu vaccine contains a mix of four versions of hemagglutinin — one for each of four ...

One of the barriers preventing bird flu from spreading efficiently in humans lies in the receptor specificity of hemagglutinin (HA)—a viral spike protein critical for entry into host cells and the ...