[1]
Toàn, Đỗ T.T., Từ, N.K. , Thái, P.Q., Thanh, P.H., Doanh, H. Đức, Hân, P.N. and Thanh, T.T.T. 2022. 30. Epidemiological characteristics of covid-19 the 4th time and some response measures in Bac Ninh province 2021. Journal of Medical Research. 156, 8 (Aug. 2022), 261-270. DOI:https://doi.org/10.52852/tcncyh.v156i8.1011.