"What's happening right now (is) we're starting to price in the reduction in earnings for 2020 and the possibility now of a recession," said Anthony Scaramucci, founder and co-managing partner of Skybridge Capital.
New York City Mayor Bill de Blasio is holding a press conference to update the public on the coronavirus outbreak that has infected at least 300 people in the city.
Tedros didn't single out any one country, but state and local leaders in the U.S. have criticized the Trump administration and CDC for limiting who could get tested in the U.S.
Stocks in Australia led loses among major markets in Asia Pacific on Monday, with the S&P/ASX 200 down 9.7% by the close. That was its largest daily drop, according to Reuters.
The U.S. Federal Reserve on Sunday announced a suite of measures aimed at cushioning the U.S. economy from the virus outbreak, including lowering benchmark interest rates to zero.
Researchers from Johns Hopkins found that 97.5% of people infected with the new coronavirus will show symptoms within 12 days of catching the virus. That's in line with current CDC recommendations that call for patients to remain in isolation for 14 days after potential exposure.
"In the days and weeks ahead, we expect to see the number of cases, the number of deaths and the number of affected countries to climb even higher," WHO Director-General Dr. Tedros Adhanom Ghebreyesus said Wednesday.
In Australia, shares recovered from earlier losses and rebounded sharply, with the S&P/ASX 200 closing 4.42% higher at 5,539.30 — after falling more than 8% at one point during the session.
Read the latest stock market news and analysis on Asia Pacific in regions from Japan, China, Singapore, Australia, to New Zealand. Find business; finance; economy, stocks, and global economy news on CNBC's Asia Pacific page.