![](https://image.cnbcfm.com/api/v1/image/106160428-1570030914911chart.jpg?v=1582501943)
Dow futures drop 850 points as coronavirus cases outside China surge
4:06pm PST - February 23rd, 2020 dow futures - CNBCSouth Korea raised its coronavirus alert to the "highest level," with the latest spike bringing the total infected to more than 750.