Study on bacterial contamination in hot trend street food - milk tea Thanh Tran, Pham Hoang Khoi, Vo Minh Tran, Tran Thi Bich Phuong, Le Thi Hong Tuyet, Van Doan Thi and Loc Huu Ho E3S Web Conf., 332 (2021) 05001 Published online: 13 December 2021 DOI: 10.1051/e3sconf/202133205001