The Immune System's David vs. Cancer's Goliath What looks here like an amoeba or a slug crawling along is a deadly enemy – a cancer cell. The much smaller, round immune cell seems powerless against it. But a new immunotherapy could help. It combines an antibody and an inhibitor in such a way that it mobilizes the T-cells of the immune system against cancer – and renders them immune to the cancer's counter-measures. An immune cell attacking a much larger cancer cell. © M. Oegg