Khalid, Sidra, Saman Saeed, Humera Kausar, and Maria Fareed Siddiqui. “Immune System and Types of Immune Responses”. Pakistan Journal of Health Sciences 1, no. 01 (June 30, 2020): 17–21. Accessed December 22, 2024. https://thejas.com.pk/index.php/pjhs/article/view/12.