It's likened to a scene from an apocalypse. Empty streets, overflowing hospitals and an overwhelming sense of fear in a city of 11 million people placed in "lock down". In China, almost two thousand people have died as a result of coronavirus with tens of thousands more infected. Authorities are resorting to extreme measures to try to halt the contagion. On Monday Four Corners charts how the outbreak occurred and investigates whether a cover up by Chinese authorities allowed the virus to spread.