Alavian S-M. Re: Hepatitis B Vaccine Coverage and the Immune Response in Children under ten years old in Sana’a, Yemen : We need to work much harder to control hepatitis B virus infection in developing countries. Sultan Qaboos Univ Med J [Internet]. 2011Nov.1 [cited 2024Apr.19];11(4):529-30. Available from: https://journals.squ.edu.om/index.php/squmj/article/view/1639