analyse backdrop background bacteria blood analysis cells cleaning clusters color colour concept contamination culture disease disinfect germs graphic green health health care illness immune immune system immunity infection medical medicine microbes microscopic mitosis pathogens petri dish probiotics sample science sickness slides swab test texture tissue unclean virus active activities children’s-play-area children’s-playground climbing colors colours community double dual enjoying enjoyment equipment fun leisure light orange outdoor outdoor-play-equipment park plastic play play-area playground playing public public-space recreation recreational safety shade shaded shadows shady sheltered slide suburban sunlight sunshine surface blood dez pain multicolored multicoloured xymonau Ebola red adventure angles appearance children children’s-area colored colorful coloured colourful cool cooling families fountain fountains multiple multiple-outlets pipes piping pour pouring spout spouting stream streams supervised water water-playground wet wet-area