Prevalence and predictors for adverse effects of Sinopharm and Sinovac COVID-19 Vaccines.


  • Sahibzada Syed Masood us Syed Sialkot Medical College (SMC), Sialkot.
  • Abid Ali Ranjha SMC.
  • Sidra Ghazanfer Khawaja Muhammad Safdar Medical College (KMSMC), Sialkot.
  • Hassan Osman Sultan Col Sultan's Lab, Sialkot.
  • Abdul Sattar KMSMC, Sialkot.
  • Syed Muhammad Shah Hussain Miran Usman General Hospital, Ugoki, Distt Sialkot.
  • Mujahid Hussain FG Degree College (for Men), Kharian Cantt, Pakistan.



Adverse Effect, COVID-19 Vaccines, Injection Site, Medical Student, Prevalence


Objective: To see the prevalence and potential predictors for side effects of Sinopharm and Sinovac COVID-19 vaccines among students of medical, and BS human nutrition and dietetics courses. Study Design: Cross-sectional Proforma-derived. Setting: Sialkot Medical College, Sialkot, Pakistan. Period: July and August, 2021. Material & Methods: Fifty students (MBBS = 30; Dietetics course = 20) with at least one dose of Sinopharm or Sinovac COVID-19 vaccine were recruited, purposively. The subjects were asked to report in an indigenously designed proforma on adverse effects using recall methodology for open time. Results: Forty nine subjects gave complete responses in the proforma. The rate of adverse effects increased from 75% (n = 3) against Sinopharm to 100% (n = 9) against Sinovac vaccine among 13 students of Dietetics who had only 1st dose. For rest of the 36 participants, the rate was found, as: 76.5% (n = 13) against each of the 1st and 2nd dose of Sinopharm; 78.9% (n = 15) against 1st and 68.4 (n = 13) against 2nd doses of Sinovac vaccine. The frequency of different adverse effects per individual ranged 1-3 (Sinopharm) or 1-4 (Sinovac). Whereas, lower rate of injection site pain was recorded on 1st dose of Sinopharm than Sinovac (52.9 vs 57.9%, respectively). None of the variables was noted as potential predictor for the side effects (p >.05). Conclusion: Sinopharm, and Sinovac COVID-19 vaccines exhibit almost similar prevalence of self-manageable side effects. Moreover, there is no predictor for the effects.

Author Biographies

Sahibzada Syed Masood us Syed, Sialkot Medical College (SMC), Sialkot.

MBBS, Ph.D, Dean Research, 

Abid Ali Ranjha, SMC.

MBBS, DCH, MPH, MSc, Assistant Professor Community Medicine, 

Sidra Ghazanfer, Khawaja Muhammad Safdar Medical College (KMSMC), Sialkot.

MBBS, M.Phil, FCPS, Assistant Professor Pathology, 

Hassan Osman Sultan, Col Sultan's Lab, Sialkot.

MBBS, M.Phil, Director, 

Abdul Sattar, KMSMC, Sialkot.

MBBS, FCPS, Professor Pathology, 

Syed Muhammad Shah Hussain Miran, Usman General Hospital, Ugoki, Distt Sialkot.

MID, MSDU, Sonologist/Demonstrator, 

Mujahid Hussain, FG Degree College (for Men), Kharian Cantt, Pakistan.

Ph.D, Assistant Professor,