. 2015 Jun 26;6:329. doi: 10.3389/fimmu.2015.00329

Table 2.

In vitro pseudotyped virus particle entry inhibition with HA stem immunized mice sera.

Immunogen	IC₅₀^a
H3HA10	13479
H3HA10-IZ	9082
H3HA10-Foldon	16935
Naïve	8287

^aIC₅₀ titer is the reciprocal of the sera dilution at which half-maximal entry inhibition was observed. Sera were collected 14 days after the boost and pooled.

The antibodies elicited by HA stem-fragment immunogens inhibited the entry of a heterologous H3 A/Wisconsin/67/2005 (with A/Udorn/307/1972 N2) influenza pseudotype virus.