Santa Rosa is the top region by number of samples, virology in Guatemala. As of 2009, number of samples, virology in Santa Rosa was 6,721 that accounts for 46.63% of Guatemala's number of samples, virology. The top 5 regions (others are Retalhuleu, Escuintla, Izabal, and Guatemala-Department) account for 91.27% of it. Guatemala's total number of samples, virology was estimated at 14,413 in 2009.