TABLE 1

Cross-reactivity between influenza A and B viruses tested by HI assay

AntigenHI titer toa:
SwH1N1pdmH1N1H3N2vB/YamagataB/VictoriaNegative control
A/swine/IA/73 (H1N1)160NDND<10<10<10
A/California/07/2009 (pdmH1N1)ND1,280<10<10<10<10
A/Minnesota/11/2010 (H3N2v)ND<10640<10<10<10
B/Yamagata lineage (ether treated)
    B/Wisconsin/1/2010<10<10<101,28040<10
    B/Brisbane/60/2008<10<10<10405,120<10
  • a ND, not determined.