Table 1.

Serum antibodies inhibit virus haemagglutination

Vaccine	Animal	HAI against FluMist®	HAI against A/PR8
Inactivated 2009–10	1	160	160
	2	160	80
	3	80	80
Live attenuated 2009–10	1	80	320
	2	160	320
	3	160	320
None	1	<10	<10
	2	<10	<10

Animal sera were tested 1 month after animal vaccination for HAI activity against FluMist^® (2011–12) or A/PR8. Serum titers are shown.