Table 2. Prevalence of dengue virus IgG in the blood donor population, northern Queensland, Australia.

Variable	No. samples	Reactive, no. (% [95% CI])
Northern Queensland	1,548	146 (9.43 [7.98–10.89])
Age group, y
<40	567	18 (3.17 [1.73–4.62])
40–60	742	70 (9.43 [7.33–11.54])
>60	239	58 (24.27 [18.83–29.70])
Outbreak
Start	788	72 (9.14 [7.13–11.15])
End	760	74 (9.74 [7.63–11.84])
Cairns	738	53 (7.18 [5.32–9.04])
Age group, y
<40	271	5 (1.85 [0.24–3.45])
40–60	360	26 (7.22 [4.55–9.90])
>60	107	22 (20.56 [12.90–28.22])
Outbreak
Start	384	31 (8.07 [5.35–10.80])
End	354	22 (6.21 [3.70–8.73])
Townsville	810	93 (11.48 [9.29–13.68])
Age group, y
<40	296	13 (4.39 [2.06–6.73])
40–60	382	44 (11.52 [8.32–14.72])
>60	132	36 (27.27 [19.68–34.87])
Outbreak
Start	404	41 (10.15 [7.20–13.09])
End	406	52 (12.81 [9.5–16.066])
Melbourne	457	31 (6.78 [4.48–9.09])
Age group, y
<40	151	11 (7.28 [3.14–11.43])
40–60	215	16 (7.44 [3.93–10.95])
>60	91	4 (4.40 [0.18–8.61])