Global stocks have lost at least $6 trillion in market value since Jan. 20 when the coronavirus outbreak first started becoming a concern for investors.

The decline accelerated this week as the spread of cases outside of China picked up pace, sparking a worldwide sell-off that led to six straight sessions of losses for stocks through Thursday.

Infections in South Korea have skyrocketed to more than 2,000 from less than 100 a week ago, while new cases in Italy and Iran have also seen a sharp up-tick and the global tally has topped 80,000.