1. COVID-19 seroprevalence in Pakistan: a cross-sectional study. Issue 4 (6th April 2022) Authors: Ahmad, Ahsan M; Shahzad, Khurram; Masood, Mariumn; Umar, Maida; Abbasi, Fahad; Hafeez, Assad Journal: BMJ open Issue: Volume 12:Issue 4(2022) Page Start: Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗