Mitochondria (artificially coloured) are swapped between cells, contrary to an earlier dogma that they stayed with their cells of origin.Credit: K.R. Porter/SPLCancer cells can poison attacking immune cells by filling them with defective mitochondria ― dampening the body’s defensive forces and helping the tumour to evade eradication1.These findings, published today in Nature, provide the strongest evidence to date that mitochondria, cellular sub-structures that produce energy, migrate in humans ...