One synthetic mixture of human milk oligosaccharides (medical management agency), it consists essentially of cream-N-neotetraose (LNnT), milk-N-tetraose (LNT), 2-fucosyllactose (2 FL), 3 -O- sialyllactoses (3 -SL), 6 -O- sialyllactoses (6-SL) also difucosyllactose (DFL) or 3 fucosyllactose (3-FL), preferably DFL, and optionally lactose. The synthetic composition can be used for: processing or preventing viral and/or the bacterium infection in a non-infant mankind Modulate the micropopulation of a non-infant mankind And/or improve a non-infant mankind recognizing ability and as drug or trophic component.