M. Al-Alousi, A. Al-Makdad, and A. Al-Jarfi, Trans., “The Prevelance of Hepatitis B Surface Antigen (HBsAg) Among Blood Donors in Some Hospitals of Thamar, Yemen”, TU J. Nat. Appl. Sci. , vol. 5, no. 1, pp. 1–9, Jan. 2023, doi: 10.59167/tujnas.v5i5.1300.