Risk for Avian Influenza Virus Exposure at Human–Wildlife Interface
Figure. Map of California displaying sample collection sites for avian influenza testing, fall 2005–summer 2007. The casual risk category is represented by a square, recreational risk category by a star, and occupational risk category by a circle. Counties are abbreviated as follows: CC, Contra Costa; GLE, Glenn; KER, Kern; LA, Los Angeles; MRN, Marin; ORA, Orange; RIV, Riverside; SAC, Sacramento; SOL, Solano; YOL, Yolo.