FILE - In this Feb. 24, 2020, file photo trader Michael Milano works on the floor of the New York Stock Exchange. The U.S. stock market opens at 9:30 a.m. EST on Thursday, Feb. 27. (AP Photo/Richard Drew, File)
Stadium seats are empty during the pro volleyball V-league between OK Savingbank Rush&Cash and KB Insurance Stars in Ansan, South Korea, Wednesday, Feb. 26, 2020. The volleyball game held without spectators as a precaution against the COVID-19. (Hong Ki-won/Yonhap via AP)
Stadium seats are empty during the Korean Basketball League between Incheon Electroland Elephants and Anyang KGC clubs in Incheon, South Korea, Wednesday, Feb. 26, 2020. The basketball game held without spectators as a precaution against the COVID-19. (Yun Tai-hyun/Yonhap via AP)
A worker wearing protective gears sprays disinfectant as a precaution against the coronavirus at a shopping street in Seoul, South Korea, Thursday, Feb. 27, 2020. The new illness persists in the worst-hit areas and spreads beyond borders. (AP Photo/Ahn Young-joon)
FIE - In this Jan. 29, 2020, file photo, people line up to buy face masks from a medical supply company in Nanning in southern China's Guangxi Zhuang Autonomous Region. Fear of the spreading coronavirus has led to a global run on sales of face masks despite medical experts' advice that most people who aren't sick don't need to wear them. (Chinatopix via AP, File)
Workers wearing protective gears arrive to spray disinfectant as a precaution against the new coronavirus at a shopping street in Seoul, South Korea, Thursday, Feb. 27, 2020. As the worst-hit areas of Asia continued to struggle with a viral epidemic, with hundreds more cases reported Thursday in South Korea and China, worries about infection and containment spread across the globe. (AP Photo/Ahn Young-joon)
Workers wearing protective gears spray disinfectant as a precaution against the new coronavirus at a subway station in Seoul, South Korea, Friday, Feb. 28, 2020. Japan's schools prepared to close for almost a month and entertainers, topped by K-pop superstars BTS, canceled events as a virus epidemic extended its spread through Asia into Europe and on Friday, into sub-Saharan Africa. (AP Photo/Ahn Young-joon)
Elementary school students carry their belongings as they make their way home in Tokyo Friday, Feb. 28, 2020. The expectation that Japan would close all its elementary, secondary and high schools will send nearly 13 million children home. (Kyodo News via AP)
A tennis fan wearing face mask waits for the start of the semi final matches of the Dubai Duty Free Tennis Championship in Dubai, United Arab Emirates, Friday, Feb. 28, 2020. (AP Photo/Kamran Jebreili)
Italian Culture Minister Dario Franceschini talks to journalists outside the Ministry headquarters in Rome, Friday, Feb. 28, 2020. Authorities in Italy decided to re-open schools and museums in some of the areas less hard-hit by the coronavirus outbreak in the country which has the most cases outside of Asia, as Italians on Friday yearned for a return to normal life even amid fears that the outbreak could plunge the country's economy into recession. (AP Photo/Gregorio Borgia)
Tourists wearing a mask walks outside the Louvre museum Friday, Feb. 28, 2020 in Paris. . The world is scrambling to get on top of the new coronavirus outbreak that has spread from its epicenter in China to most corners of the planet. Governments and doctors are presenting an array of approaches as the virus disrupts daily routines, business plans and international travel around the world. (AP Photo/Rafael Yaghobzadeh)
A man wearing a face mask walks outside Yaba Mainland hospital where an Italian citizen - the country's first case of the COVID-19 virus - is being treated, in Lagos, Nigeria Friday, Feb. 28, 2020. Nigeria's health authorities have reported the country's first case of a new coronavirus in Lagos, the first confirmed appearance of the disease in sub-Saharan Africa. (AP Photo/ Sunday Alamba)
Workers wearing protective gears arrive to spray disinfectant as a precaution against the new coronavirus at a shopping street in Seoul, South Korea, Thursday, Feb. 27, 2020. As the worst-hit areas of Asia continued to struggle with a viral epidemic, with hundreds more cases reported Thursday in South Korea and China, worries about infection and containment spread across the globe. (AP Photo/Ahn Young-joon)
In this handout photo members of Bulgarian soccer team Ludogorets, wearing protective face masks arrive at Malpensa airport in Milan, Italy, Wednesday Feb. 26, 2020. Ludogorets arrived in Italy to play Italian club Inter Milan in a Europa League soccer match on Thursday that is scheduled to go ahead in an empty stadium due to the coronavirus outbreak.(Ludogorets FC via AP)
A paramedic wearing a mask gets out of a tent set up by the Italian Civil Protection outside the emergency ward of the Piacenza hospital, northern Italy, Thursday, Feb. 27, 2020. Italy is changing how it reports coronavirus cases and who will get tested in ways that could lower the country's caseload even as an outbreak centered in northern Italy spreads in Europe. (Claudio Furlan/Lapresse via AP)
Tourists, wearing face masks, pose for a selfie in downtown Milan, Italy, Thursday, Feb. 27, 2020. In Europe, an expanding cluster in northern Italy is eyed as a source for transmissions of the COVID-19 disease. (AP Photo/Luca Bruno)
Lawmakers Matteo Dall'Osso, right, and Maria Teresa Baldini wear sanitary mask during a work session in the Italian lower chamber Tuesday, Feb. 25, 2020. Civil protection officials on Tuesday reported a large jump of cases in Italy, from 222 to 283. Seven people have died, all of them elderly people suffering other pathologies. (Roberto Monaldo/LaPresse via AP)
A worker disinfects a public bus against coronavirus in Tehran, Iran, in early morning of Wednesday, Feb. 26, 2020. Iran's government said Tuesday that more than a dozen people had died nationwide from the new coronavirus, rejecting claims of a much higher death toll of 50 by a lawmaker from the city of Qom that has been at the epicenter of the virus in the country. (AP Photo/Ebrahim Noroozi)
Officials wearing protective attire work to diagnose people with suspected symptoms of the new coronavirus at a hospital in Daegu, South Korea, Wednesday, Feb. 26, 2020. The number of new virus infections in South Korea jumped again Wednesday and the U.S. military reported its first case among its soldiers based in the Asian country, with his case and many others connected to a southeastern city with an illness cluster. A sign reads "Emergency Medical Center." (Kim Hyun-tae/Yonhap via AP)
In this photo released by Malaysia's Ministry of Health, health workers prepare for the arrival of evacuated Malaysians from China's Wuhan, the epicenter of the new coronavirus outbreak, at Kuala Lumpur International Airport in Sepang, Malaysia, Wednesday, Feb. 26, 2020. U.S. health officials warned Tuesday that the burgeoning coronavirus is certain to spread more widely in the country at some point, even as their counterparts in Europe and Asia scrambled to contain new outbreaks of the illness. (Muzzafar Kasim/Malaysia's Ministry of Health via AP)
Chonnam National University staff wearing protective attire are on standby for special transportation for Chinese students studying at their university, at Incheon International Airport in Incheon, South Korea, Tuesday, Feb. 25, 2020. Chinese students of the university are to arrive from China after their holiday. China and South Korea on Tuesday reported more cases of a new viral illness that has been concentrated in North Asia but is causing global worry as clusters grow in the Middle East and Europe. (AP Photo/Ahn Young-joon)
Workers disinfect subway trains against coronavirus in Tehran, Iran, in the early morning of Tuesday, Feb. 25, 2020. Iran's government said Tuesday that more than a dozen people had died nationwide from the new coronavirus, rejecting claims of a much higher death toll of 50 by a lawmaker from the city of Qom that has been at the epicenter of the virus in the country. (Sajjad Safari/IIPA via AP)
A health worker wears protective suit at the infectious disease clinic in Zagreb, Croatia, where the first coronavirus case in Croatia is hospitalized. (AP Photo/Darko Bandic)
Airport staff check the temperatures of passengers returning from Milan as part of the coronavirus screening procedure at the Debrecen airport, Hungary, Tuesday, Feb. 25, 2020. The precautionary measures were introduced following the report of over 200 confirmed cases of COVID-19 disease and at least seven deaths in northern Italy. The first Hungarian diagnosed with coronavirus had been working on the Diamond Princess cruise ship quarantined in Japan. (Zsolt Czeglédi/MTI via AP)
Workers in protective suits spray disinfectant as a precaution against the COVID-19 at an indoor gymnasium in Seoul, South Korea, Tuesday, Feb. 25, 2020. China and South Korea on Tuesday reported more cases of a new viral illness that has been concentrated in North Asia but is causing global worry as clusters grow in the Middle East and Europe. (AP Photo/Lee Jin-man)