14.12.2020, Singapore, , Singapore - A worker walks past a construction site in a residential area where a large banner on the site fence warns of the danger of spreading and contracting dengue fever from mosquitoes, as they use standing water like that found on construction sites as possible breeding grounds.. 0SL201214D002CAROEX.JPG [MODEL RELEASE: NO, PROPERTY RELEASE: NO (c) caro images / Schuelke, http://www.caro-images.com, [email protected] - In case of using the picture for any purpose, please contact the agency - the picture is subject to royalty!]