Table 5.

HI titers of goat antisera generated by immunization with purified H7 antigens.

Immunogen	Antiserum
	NIBSC code: 13/180a	NHRI: Y-291b
H7N9 (RG268-01) cell-derived antigen	640	640
H7N9 (NIBRG-268) egg-derived antigen c	640	640

^aNIBSC code: 13/180: An antiserum reagent prepared in sheep SH596 cells yielded the purified cell-derived HA of NIBRG-270 (A/Anhui/1/2013 x A/PR/8/34).

^bY-291: The purified cell-derived HA was prepared by immunization of goats with the antiserum reagent (A/Anhui/01/2013 (H7N9), RG268-01).

^cThe egg-derived antigen of influenza A/Anhui/1/2013 (H7N9) (NIBRG-268) was purchased from the NIBSC (code: 14/250).