Investigating the impact of prior COVID‐19 on IgG antibody and interferon γ responses after BBIBP‐CorV vaccination in a disease endemic population: A prospective observational stud... oleh Zahra Hasan, Kiran Iqbal Masood, Shama Qaiser, Erum Khan, Areeba Hussain, Zara Ghous, Unab Khan, Maliha Yameen, Imran Hassan, Muhammad Imran Nasir, Muhammad Farrukh Qazi, Haris Ali Memon, Shiza Ali, Sadaf Baloch, Zulfiqar A. Bhutta, Marc Veldhoen, J. Pedro Simas, Syed Faisal Mahmood, Kulsoom Ghias, Rabia Hussain