Volume 29, Number 1—January 2023
Research
Human Immunity and Susceptibility to Influenza A(H3) Viruses of Avian, Equine, and Swine Origin
Elien Vandoorn, Wojciech Stadejek, Isabel Leroux-Roels, Geert Leroux-Roels, Anna Parys, and Kristien Van Reeth
Table 4
Geometric mean of hemagglutination inhibition antibody titers against H3 influenza A viruses of different species in different age groups, Belgium, 2017–2018*
| Birth year range (age, y)† |
No. | Avian |
Equine |
Human |
Swine |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| dkUK63 |
mlOH18 |
mlBE18 |
chG19 |
eqCH18 |
HK68‡ |
swG17 |
swIN16 |
swMO15 |
|||||
| Eurasian | Am. | Eurasian | Eurasian | FC1 | Pandemic | European | N. Am. | N. Am. | |||||
| 1921–1926 (96–91) | 14 | 16 (10–25) | 16 (10–23) | 13 (10–19) | 12 (10–16) | 10 (10–10) | 30 (17–52) | 23 (14–38) | 42 (24–75) | 80 (29–219) | |||
| 1927–1936 (90–81) | 30 | 15 (12–19) | 16 (12–21) | 14 (11–16) | 13 (10–16) | 10 (10–11) | 26 (20–35) | 14 (11–18) | 25 (17–36) | 59 (35–99) | |||
| 1937–1946 (80–71) | 30 | 13 (11–16) | 15 (12–19) | 13 (11–15) | 11 (10–12) | 10 (10–10) | 37 (27–51) | 12 (11–14) | 16 (12–22) | 52 (32–83) | |||
| 1947–1956 (70–61) | 30 | 15 (12–19) | 18 (14–23) | 16 (12–21) | 11 (10–13) | 10 (10–10) | 180 (128–252) | 29 (21–39) | 30 (20–43) | 59 (39–91) | |||
| 1957–1966 (60–51) | 30 | 13 (11–16) | 16 (13–20) | 16 (13–20) | 11 (10–12) | 11 (10–13) | 327 (249–432) | 44 (30–63) | 31 (22–44) | 58 (40–83) | |||
| 1967–1976 (50–41) | 30 | 14 (11–18) | 14 (11–17) | 12 (10–15) | 10 (10–11) | 12 (10–15) | 80 (43–150) | 58 (40–83) | 61 (40–91) | 78 (49–124) | |||
| 1977–1986 (40–31) | 30 | 13 (10–17) | 13 (10–15) | 11 (10–14) | 10 (10–11) | 10 (10–11) | 32 (21–50) | 45 (34–58) | 146 (105–202) | 98 (60–162) | |||
| 1987–1996 (30–21) | 30 | 10 (10–11) | 10 (10–10) | 10 (10–10) | 10 (10–10) | 10 (10–10) | 30 (21–42) | 25 (18–35) | 139 (87–224) | 254 (170–380) | |||
| 1997–2006 (20–11) | 30 | 10 (10–10) | 10 (10–10) | 10 (10–10) | 10 (10–10) | 10 (10–10) | 10 (10–12) | 11 (10–13) | 19 (14–26) | 101 (64–158) | |||
| 2007–2017 (10–0) |
32 |
10 (10–10) |
10 (10–10) |
10 (10–10) |
10 (10–10) |
10 (10–10) |
11 (10–12) |
11 (10–13) |
11 (10–13) |
37 (25–54) |
|||
| 1921–2017 (96–0) | 286 | 13 (12–13) | 13 (12–14) | 12 (12–13) | 11 (10–11) | 10 (10–11) | 42 (36–49) | 23 (21–26) | 36 (31–42) | 75 (64–87) | |||
*Values represent geometric mean hemagglutination inhibition titers (95% CI). Viruses are ordered according to host species and chronologically according to the emergence of each of the influenza A virus lineages in these species. Complete isolate names are provided in [[ANCHOR###T2###Table 2###Anchor]]. Am., American; FC1, Florida clade 1; N. Am., North American. †Age at the end of 2017. ‡Human influenza A virus that no longer circulates.
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