Iqbal, Rana Khalid, Alia Imtiaz, Anzeela Yousaf, Fatima Kanwal, and Muhammad Baber. 2020. “Vaccination Against Hepatitis B Virus through Various Strategies”. National Journal of Health Sciences 4 (4):153-57. https://ojs.njhsciences.com/index.php/njhs/article/view/31.