GARVAN INSTITUTE OF MEDICAL RESEARCH IMAGE: 2-PHOTON MICROSCOPE IMAGE OF THE GERMINAL CENTRE INSIDE A LYMPH NODE, SHOWING B CELLS (GREEN) MOVING AROUND AND A TINGIBLE BODY MACROPHAGE (RED) GRABBING THE DEAD AND DYING B CELLS CREDIT: GARVAN For almost 140 years, the origin and behaviour of an enigmatic cell type inside lymph nodes, called...
