Table. Characteristics of chikungunya outbreak in South India, 2005–2006*.

Area	Mallela, Andhra Pradesh	Gowripet, Avadi, Tamil Nadu
Setting	Rural	Urban
Population	1,965	2,649
Attack rate
Overall	12% (n = 242)	23% (n = 575)
Age, y		5.8%
0–4	2.4%	20%
5–14	3.6%	24%
15–44	12.9%	22.8%
>45	22.2%
Gender		18.9%
M	9.9%
F	14.8%	24.5%
Chikungunya-specific IgM positivity	67% (90/134)	56% (5/9)
Subclinical infection
No. tested	100 in all age groups	ND
Age-specific prevalence of IgM antibodies
5–14 y	4%	ND
15–44 y	8%	ND
>45 y	3%	ND

*Ig, immunoglobulin; ND, not done.