HARARE, May 5, 2020 (Xinhua) -- Two children wearing face masks walk on a street in Harare, Zimbabwe, May 4, 2020. Zimbabwean President Emmerson Mnangagwa on May 1 extended a lockdown aimed at curbing the spread of COVID-19 by two more weeks to May 17. Police in Zimbabwe will arrest anyone leaving their homes without wearing face masks starting Monday.

CHANGSHA, May 5, 2020 (Xinhua) -- A visitor takes pictures during an art exhibition titled Tribute to Da Vinci at the Changsha IFS in Changsha, central Chinas Hunan Province, May 4, 2020.

WASHINGTON D.C., May 5, 2020 (Xinhua) -- The U.S. Capitol Building is seen in Washington D.C., the United States, May 4, 2020. The U.S. Senate returns to session amid the COVID-19 pandemic on Monday.

TUNIS, May 5, 2020 (Xinhua) -- Passengers are seen at a metro station in downtown Tunis, Tunisia, May 4, 2020. After about six weeks of general confinement imposed by Tunisian authorities across the country to confront the novel coronavirus, over three million Tunisians have returned to work on Monday in various sectors.

KUALA LUMPUR, May 5, 2020 (Xinhua) -- Cars travel on a street in Kuala Lumpur, Malaysia, May 4, 2020. Malaysia started to restart most of its economic activities on Monday, as new COVID-19 cases in the country dropped after a short spike during the weekend.

RIGA, May 5, 2020 (Xinhua) -- A couple dressed in Latvian national costumes pose for a photo while laying flowers to the Freedom Monument in Riga, Latvia, May 4, 2020, as the country marks the 30th anniversary of its declaration of independence. May 4 is celebrated by Latvians to mark the day the country declared independence from the former Soviet Union in 1990. Due to the COVID-19 pandemic, national-wide celebrations this year mostly took place at home as all annual events were cancelled.