analyse backdrop background bacteria blood blood analysis cells cleaning clusters color colour concept contamination culture disease disinfect germs graphic health health care hi res illness immune immune system immunity infection medicine microbes microscopic red sample science sickness slides swab texture tissue unclean virus white baked bread cereal food grain organic pastry slice sliced toast traditional body fever high hospital ill measure sick temperature thermometer cure drugs hand medical medication pills therapy eat fresh fruit hunger kiwi meal nourishment nutrition one snack aqua bath circle drain empty flush hottub relax spa water ailment ash ashtray cancer cigarette cigars death disase glass smoke smoking citrus Clementine healthy juice mandarin orange peel segment Tangerine