All Shanghai's 16 districts have achieved zero community transmission as the city's daily infection number keeps declining.

The number of local infections fell about 12 percent to 823 on Monday, with zero community infections for the third consecutive day, said Zhao Dandan, deputy director of the Shanghai Health Commission.

Over 19 million residents, 78 percent of the city's total population, are in precautionary areas – communities, villages, companies and sites without a positive case in the past two weeks.