Three vendors in Son Ky Market in Tan Phu District contracted the virus when they visited the Hoc Mon market on June 19.
Through contact tracing health authorities found 93 others, including their family members, other vendors and people living near the market, had contracted Covid from them.
The infection chain at Kim Bien Market in District 5 was unearthed on June 16 after a relative of a market employee tested positive.
Hoa Hung and Nguyen Tri Phuong markets in District 10 and Hoang Hoa Tham Market in Tan Binh District have also been closed.
The city earlier shut down all temporary street markets on June 19, especially those in industrial zones with a lot of workers, amid a surge in Covis-19 cases.
It has been in the grip of the worst ever outbreak with 3,280 cases as of Monday morning, the second highest in Vietnam after Bac Giang Province’s 5,600.
The latest wave began in late April.