Table 1.

Culture confirmed influenza episodes identified by immunoperoxidase staining or by hemagglutination inhibition titration

Total Number of Influenza A or B isolates	Number identified by immunoperoxidase typing only	Number identified by hemagglutination inhibition for A/H1, A/H3 and B lineage
10 Influenza A isolates	3	5 H3 A/California/7/2004-like*
		2 H1 A/New Caledonia/20/1999* and A/Czech Republic/109/2005*
36 Influenza B isolates	1	35 B/Hong Kong 330/01-like**

* Antigenically related to the H1N1 or H3N2 vaccine strains

** Not antigenically related to the B strain from the Yamagata lineage contained in the vaccine