. 2024 Jan 9;15(2):e02372-23. doi: 10.1128/mbio.02372-23

TABLE 3.

Median antibody titers before H1N1 challenge at day −1 grouped by participant shedding status^c^,d,e

	Non-shedders	1-day shedders	Long-shedders^a	P-value^b
Total N	21	19	34
Serum HAI	80	80	20	0.0008
Serum NAI	160	160	80	0.0079
Serum HA IgG	447,088	402,805	290,263	0.0008
Serum HA stalk IgG	187,087	196,786	130,218	0.0739
Serum NA	5,967	4,556	3,879	0.1633
Nasal HA IgA	953	790	467	0.0273
Nasal HA stalk IgA	586	1,215	790	0.2374
Nasal NA IgA	36	35	35	0.8814

^{^a}

Long-shedders defined as those with 2 or more days of shedding.

^{^b}

P-values from Kruskal–Wallis tests (pairwise Wilcoxon rank sum tests adjusted by the Benjamini–Hochberg method performed when P-value <0.05, results available in supplemental). P < 0.05 considered statistically significant.

^{^c}

Symptoms defined as presence of at least one influenza symptom.

^{^d}

Shedding defined as presence of shedding on at least 1 day.

^{^e}

HAI, hemagglutinin inhibition; NAI, neuraminidase inhibition; HA, hemagglutinin; NA, neuraminidase.