Volume 28, Number 10—October 2022
Research
Novel Zoonotic Avian Influenza A(H3N8) Virus in Chicken, Hong Kong, China
Thomas H.C. Sit, Wanying Sun, Anne C.N. Tse, Christopher J. Brackman, Samuel M.S. Cheng, Amy W. Yan Tang, Jonathan T.L Cheung, Malik Peiris1
, and Leo L.M. Poon1
, and Leo L.M. Poon1
Table 6
Seroprevalence of antibodies to human seasonal influenza virus A/Switzerland/8060/2017 (H3N2) and A/chicken/Hong Kong/MKT-AB13cp/2022 (H3N8) virus in age-stratified human serum samples from blood donors, Hong Kong, China, 2020*
| Age group, y | No. | H3N2 HI titers, no. (%) |
H3N8 HI titer, no. (%) |
H3N2 GMT (95% CI) | H3N8 GMT (95% CI) | |||
|---|---|---|---|---|---|---|---|---|
| >1:10 | >1:40 | >1:10 | >1:40 | |||||
| 10–19 | 10 | 10 (100) | 9 (90) | 0 | 0 | 183.8 (74.8–451.7) | 5 (5–5) | |
| 20–29 | 10 | 7 (70) | 7 (70) | 0 | 0 | 37.32 (11.8–118.6) | 5 (5–5) | |
| 30–39 | 10 | 5 (50) | 5 (50) | 0 | 0 | 20 (6.7–59.9) | 5 (5–5) | |
| 40–49 | 10 | 8 (80) | 6 (60) | 3 (30) | 1 (10) | 30.31 (12.6–73.1) | 7.071 (4.4–11.5) | |
| 50–59 | 10 | 3 (30) | 0 | 2 (20) | 0 | 7.1 (4.6–10.8) | 5.743 (4.7–7.1) | |
| 60–69 | 10 | 9 (90) | 9 (90) | 1 (10) | 1 (10) | 56.6 (25.8–123.9) | 6.156 (3.9–9.9) | |
| 70–79 |
3 |
1 (33) |
1 (3) |
0 |
0 |
12.6 (0.2–671.9) |
5 (5–5) |
|
| Total | 63 | 43 (68.3) | 37 (58.7) | 6 (9.5) | 2 (3.2) | 32.8 (22.1–48.8) | 5.6 (5.1–6.2) | |
*GMT, geometric mean titer; HI, hemagglutination inhibition.
1These authors contributed equally to this article.
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