I'd like to know how reliable the data on Rio is. Are there more Zika infections than in the poor north eastern part of Brazil or are (suspected) cases just much more like to be reported due to easier access to qualified medical care? Is distribution in Rio uniform or does it mostly concern very poor areas which are very unlikely to be visited by tourists anyway?

NB: The dengue data they refer to[1] shows a sharp decline in infections from May on, at the end of the wet season (obviously inferring from 2015 data).

[1] http://www.rio.rj.gov.br/dlstatic/10112/5880996/4153672/deng...