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The raw numbers of positive sites, positive mosquito pools in each positive site, and mosquitoes in each positive mosquito pool for years 2002–2007 in Indianapolis, USA.
| Year | WNV infection | ||
| Raw number of positive sites | Raw number of positive mosquito pools in each positive site | Raw number of mosquitoes in each positive mosquito pool | |
| 2002 | 59 | 225 | 7807 |
| 2003 | 39 | 81 | 3228 |
| 2004 | 29 | 64 | 2722 |
| 2005 | 40 | 95 | 4266 |
| 2006 | 30 | 96 | 4181 |
| 2007 | 16 | 31 | 1230 |
