More than half of Shanghai's recent COVID-19 infections were found in the city's locked-down areas, mainly urban villages and old residential compounds, according to the Shanghai Health Commission.Shanghai reported a total of 29,742 positive cases between May 1 and 6, including 54.1 percent found during the screening in locked-down areas, 28.8 percent detected among people under central quarantine and 7.7 percent in enclosed key sites.The rest of less than 10 percent of new cases were found at the city's controlled and precautionary areas as well as in high-risk groups, said Zhao Dandan, deputy director of the commission.