The doom-laden forecasts have been coming thick and fast this week warning of the steepest downturn since the Great Depression of the 1930s, a lost decade of growth in Latin America and a shrinking Chinese economy for the first time since 1992. To help put these figures into context and explain what the coronavirus economic fallout means for trade demand we have this week drafted in Tom Rogers, head of macroeconomic consulting for Asia at Oxford Economics as well as our own China editor Cichen Shen.