A prospective cohort study protocol: monitoring and surveillance of adverse events following heterologous booster doses of Oxford AstraZeneca COVID-19 vaccine in previous recipients of two doses of Sinopharm or Sputnik V vaccines in Iran

• Shahin SoltaniKermanshah University of Medical Sciences
• Behzad Karami MatinKermanshah University of Medical Sciences
• Mohammad Mehdí GouyaMinistry of Health and Medical Education
• Seyed Mohsen ZahraeiIsfahan University of Medical Sciences
• Ghobad MoradiKurdistan University of Medical Sciences
• Omid ChehriKermanshah University of Medical Sciences
• Moslem SoofiKermanshah University of Medical Sciences
• Mehdi MoradinazarKermanshah University of Medical Sciences
• Fatemeh Khosravi ShadmaniKermanshah University of Medical Sciences
• Mahsa KalantariKermanshah University of Medical Sciences
• Hamidreza KhajehaShahroud University of Medical Sciences
• Mohammad Hassan EmamianShahroud University of Medical Sciences
• Farid NajafiKermanshah University of Medical Sciences