A food delivery courier, center, rides a bike among emptied office buildings during an evening rush hour, with the St. Nicholas church in the background, in Moscow, Russia, Thursday, April 2, 2020. President Vladimir Putin has ordered most Russians to stay off work until the end of the month to curb the spread of the coronavirus. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Pavel Golovkin)

People move through a disinfecting tunnel at a vegetable and fruit market as government-imposed a nationwide lockdown to contain the outbreak of the coronavirus, in Islamabad, Pakistan, Thursday, April 2, 2020. (AP Photo/B.K. Bangash)

FILE - In this Monday, March 9, 2020 file photo, Britain's Prince Charles and Camilla the Duchess of Cornwall, in the background, leave after attending the annual Commonwealth Day service at Westminster Abbey in London, Monday, March 9, 2020. Prince Charles, the heir to the British throne, has tested positive for the new coronavirus. The prince’s Clarence House office reported on Wednesday, March 25, 2020 that the 71-year-old is showing mild symptoms of COVID-19 and is self-isolating at a royal estate in Scotland. For most people, the coronavirus causes mild or moderate symptoms, such as fever and cough that clear up in two to three weeks (AP Photo/Kirsty Wigglesworth, File)

An Impoverished Indians gives his finger print on a biometric machine after purchasing food ration in Prayagraj, India, Thursday, April 2, 2020. India is adding more resources to tackle its increase in coronavirus cases by announcing that private hospitals may be requisitioned to help treat virus patients, and turning railway cars and a motor racing circuit into makeshift quarantine facilities. The steps were taken after a nationwide lockdown announced last week by Prime Minister Narendra Modi led to a mass exodus of migrant workers from cities to their villages, often on foot and without food and water, raising fears that the virus may have reached to the countryside, where health care facilities are limited. (AP Photo/Rajesh Kumar Singh)

A couple wear protective gloves as they sit together in a public garden amid the coronavirus outbreak, in Ankara, Turkey Thursday, March 26, 2020. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death.(AP Photo/Burhan Ozbilici)

The Alexandre III bridge is pictured from an deserted street during a nationwide confinement to counter the Covid-19, in Paris, Thursday, April 2, 2020. The new coronavirus causes mild or moderate symptoms for most people, but for some, especially older adults and people with existing health problems, it can cause more severe illness or death. (AP Photo/Christophe Ena)

A man wearing a face mask to help protect against the spread of the new coronavirus walks on the underpass in Seoul, South Korea, Thursday, April 2, 2020. For most people, the new coronavirus causes only mild or moderate symptoms, such as fever and cough. For some, especially older adults and people with existing health problems, it can cause more severe illness, including pneumonia. (AP Photo/Ahn Young-joon)

Police officers checks their phones as they walk on Trocadero plaza during a nationwide confinement to counter the new coronavirus, in Paris, Thursday, April 2,For most people, the new coronavirus causes only mild or moderate symptoms, such as fever and cough. For some, especially older adults and people with existing health problems, it can cause more severe illness, including pneumonia. Eiffel Tower in the background. (AP Photo/Michel Euler)