. 2015 Oct 27;6(6):e01024-15. doi: 10.1128/mBio.01024-15

TABLE 2 .

Ability of sera from vaccinated or infected mice to neutralize X31 and PR8 infection of MDCK cells^a

Mouse vaccination or infection category	Titer (log₁₀) of virus strain^b:
Mouse vaccination or infection category	PR8	X31
PBS	<1	<1
Split virus	<1	<1
Split virus + R₄Pam₂Cys	3.95 ± 0.4	<1
PR8 infected	4.50 ± 0.0	<1
X31 infected	<1	3.52 ± 0.2

^{^a}

Viral neutralization tests were performed using sera (n = 5) taken 35 days after vaccination or infection.

^{^b}

Titers (log₁₀) are expressed as the highest average dilution (± standard deviation) that reduced plaque numbers to 50% of the titers obtained in the presence of serum from unvaccinated mice.