Figure 4From: Analyzing spatial clustering and the spatiotemporal nature and trends of HIV/AIDS prevalence using GIS: the case of Malawi, 1994-2010 Interpolated spatiotemporal trends of the HIV/AIDS Epidemic among pregnant women, 1994 – 2001. Continuous images produced by interpolating (IDW method at 1 km spatial resolution) HIV prevalence (%) among pregnant women attending the original 19 HIV sentinel centers in 1994, 1996, 1999 and 2001.Back to article page