Fig. 1From: An outbreak vector-host epidemic model with spatial structure: the 2015–2016 Zika outbreak in Rio De JaneiroRio de Janeiro Municipality sub-districts. The sub-district population densities range from 1,000 to 50,000 inhabitants per square kilometer. The Municipality is approximately 50 kilometers east-west by 20 kilometers north-south, with the highest population density in the eastern region. The total population is approximately 6,000,000. (Source: http://www.citypopulation.de/php/brazil-rio. php)Back to article page