Dr Saira Rehman, Dr Farah Qamar Naz, Dr Ibtisam Qazi. KNOWLEDGE AND ATTITUDE ABOUT COVID-19 VACCINES AND THEIR BOOSTERS AMONG HEALTHCARE WORKERS (HCWS) AT SECONDARY AND TERTIARY CARE HOSPITALS IN KARACHI, PAKISTAN. IJHR. 2026;4(3):1-10. doi:10.71000/557m7869