Figure 2

Number of weekly incident cases of Chikungunya, La Réunion Island, March 28 ^th , 2005 – April 16 ^th , 2006 (n = 244,000). Reported by the active case-finding system between weeks 9 and 50, 2005 or estimated from the sentinel physician network between week 51 of 2005 and week 15, 2006. Published by Renault P, et al. in Am J Trop Med Hyg, 2007, 77: 727–731 [11], and reprinted with the kind permission of the American Society of Tropical Medicine and Hygiene (Atlanta, USA). "Survey 1" corresponds to the rapid serological survey on pregnant women (January 15^th 2006 to February 15^th 2006); "Survey 2" corresponds to the population-based SEROCHIK survey (August 17^th to October 20^th 2006).