Pre-Vaccination Profiles and Factors Associated with Suspected COVID-19 Infection in Vaccine Candidates in The Democratic Republic of Congo: A Cross-Sectional Study

Authors

  • Eric Kasongo Mukenge Department of Clinical Biology, University of Kinshasa, Kinshasa, Democratic Republic of Congo
  • Aliocha Natuhoyila Nkodila Department of Family Medicine and Primary Health Care, Protestant University of Congo, Kinshasa, Democratic Republic of Congo
  • Christian Nsimba Lengo Department of Clinical Biology, University of Kinshasa, Kinshasa, Democratic Republic of Congo
  • Blaise Matondo-Manzambi Sumbu Department of Clinical Biology, University of Kinshasa, Kinshasa, Democratic Republic of Congo
  • Jérémie Masidi Muwonga Department of Clinical Biology, University of Kinshasa, Kinshasa, Democratic Republic of Congo
  • Jean-Robert Rissassi Makulo Department of Internal Medicine, University of Kinshasa, Kinshasa, Democratic Republic of Congo
  • Mamy Zita Ngole Department of Clinical Biology, University of Kinshasa, Kinshasa, Democratic Republic of Congo
  • Ben Izizag Bepouka Department of Internal Medicine, University of Kinshasa, Kinshasa, Democratic Republic of Congo
  • Guyguy Kamwiziku Department of Microbiology, University of Kinshasa, Kinshasa, Democratic Republic of Congo
  • Hippolyte Nani-Tuma Situakibanza Department of Internal Medicine, University of Kinshasa, Kinshasa, Democratic Republic of Congo
  • Mireille Nkanga Nganga Department of Clinical Biology, University of Kinshasa, Kinshasa, Democratic Republic of Congo
  • Gustave Ntita Ilunga Department of Clinical Biology, University of Kinshasa, Kinshasa, Democratic Republic of Congo
  • Fonce Tshibawu Nkunda Department of Clinical Biology, University of Kinshasa, Kinshasa, Democratic Republic of Congo
  • Steve Mundeke Ahuka Department of Microbiology, University of Kinshasa, Kinshasa, Democratic Republic of Congo

DOI:

https://doi.org/10.55489/njmr.150420251201

Keywords:

Profile, COVID-19 vaccine, Cross-sectional study, NLR ratio, pre-vaccination screening, DRC

Abstract

Background: The aim of this study was a pre-vaccination profile assessment to identify risks for adverse events.

Methods: Cross-sectional, analytical study including 1,500 individuals presenting for COVID-19 vaccination at the Cliniques Universitaires de Kinshasa between April 19 and December 31, 2021.

Results: Of 1500 individuals examined, 69.3% were male (sex ratio 3H/1F), mean age 47.5±16.0 years. A significant inverse relationship was observed between age and AST on the one hand (p=0.015); and age and ALT on the other (p=0.011). The correlation was 46.3% for AST and 46.9% for ALT. A total of 9.5% of individuals presenting for vaccination had an NLR greater than or equal to 2, signifying a COVID-19 infection. Female gender (aOR: 2.94 IC95%: 1.99-3.96), the presence of comorbidity (aOR: 2.83; 95%CI: 1.88-3.88), the presence of abnormal PAL (aOR: 2.12; 95%CI: 1.24-3.62) and the presence of abnormal RBC (aOR: 1.92; 95%CI: 1.22-3.01) were the factors independently associated with the COVID-19 infection in the study population.

Conclusion: The results show a normal biological profile, but they highlight the importance of certain simple biological markers in screening for COVID-19 infection in an asymptomatic population.

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Published

2025-10-01

How to Cite

Mukenge, E. K., Nkodila, A. N., Lengo, C. N., Sumbu, B. M.-M., Muwonga, J. M., Rissassi Makulo, J.-R., … Ahuka, S. M. (2025). Pre-Vaccination Profiles and Factors Associated with Suspected COVID-19 Infection in Vaccine Candidates in The Democratic Republic of Congo: A Cross-Sectional Study. National Journal of Medical Research, 15(04), 293–300. https://doi.org/10.55489/njmr.150420251201

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Original Research Articles