A man wearing a face mask takes a bus in Warsaw, Poland on April 16, 2020.(Photo by Jaap Arriens/Xinhua)

-- COVID-19 deaths in Italy pass 23,000;

-- Spanish PM says to seek extension of state of alarm as death toll tops 20,000;

-- UK death toll surpasses 15,000;

-- France reports 642 more deaths, raising death toll to 19,323.