The situation might not have been so bad if the economy wasn't already way overextended going into this. Months of trade war and years of economic stimulus have left the country ill-prepared and with few economic tools to weather this storm.
Many countries across Asia are already exposed beyond containment. Now we're talking about possible spread in Europe as well. Markets have every right to be concerned. This is scary stuff.
Here we can see the gap down in the US stock markets (left) over the weekend and the gap up in gold (right). It's extremely clear that investors are reducing risk as Wall Street prepares their day.