Structural basis of preexisting immunity to the 2009 H1N1 pandemic influenza virus.
Xu, R., Ekiert, D.C., Krause, J.C., Hai, R., Crowe, J.E., Wilson, I.A.(2010) Science 328: 357-360
- PubMed: 20339031 
- DOI: 10.1126/science.1186430
- Primary Citation of Related Structures:  
3LZF, 3LZG - PubMed Abstract: 
The 2009 H1N1 swine flu is the first influenza pandemic in decades. The crystal structure of the hemagglutinin from the A/California/04/2009 H1N1 virus shows that its antigenic structure, particularly within the Sa antigenic site, is extremely similar to those of human H1N1 viruses circulating early in the 20th century ...