Infografía: Defensa inmunitaria

Scientific infographic poster 'IMMUNE DEFENSE' presenting a cross-section of the human body as a stylized fortress scene in flat vector style: a deep-red bloodstream highway with white blood cells drawn as rounded guards in blue, antibodies as small Y-shaped yellow soldiers, and three pathogen intruders—green virus, purple bacterium and gray fungus—entering from the left, blocked by a layered shield diagram. A bottom horizontal flowchart shows four defense stages: physical barrier, innate immune response, adaptive immunity, and memory cells, each in a colored card with a small icon. Color palette: blood red #D32F2F, white-cell blue #1E88E5, antibody gold #F9A825, pathogen green #43A047, purple #8E24AA, on a clean white background with subtle molecular dot texture. Bold sans-serif labels, soft directional studio light, clear data hierarchy, medical poster finish, 4k