The World Health Organization (WHO) sounded its highest alarm on 30 January 2020 — a declaration called a ‘public health emergency of international concern’, or PHEIC, signalling that a pandemic might be imminent. Few countries heeded the WHO’s call for testing, tracing and social distancing to curb the coronavirus. By mid-March, it had spread around the world. Now, health officials and researchers are evaluating why the organization’s warning system failed and how to overhaul it…more