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COVID-19

Comparative Analysis of COVID-19 Vaccines Reveals Pfizer Performs Best

Strategic Insights

— 1 min read

Researchers from Cairo University compared the immune response of Pfizer, Sinovac, and Influvac tetra vaccines in albino rats, with fascinating results. The study aimed to investigate the effects of these vaccines on submandibular glands (SMGs) and associated lymph nodes. Forty rats were allocated into four groups, with the Pfizer vaccine showing the highest mean immunoglobulins G and A readings. Notably, the Pfizer group had the most T cells and the highest serum concentrations of IgG and IgA, indicating a robust immune response.

Key Takeaways:

  • The Pfizer vaccine exhibited the highest mean immunoglobulins G and A readings, followed by Sinovac, Influenza, and the control group.
  • Histopathological examination revealed nearly normal gland architecture in all groups, but mild changes were observed in vaccinated groups.
  • The Pfizer group had the greatest CD3 immunoexpression, indicating a strong immune response.
  • All vaccines were generally safe, with no impact on salivary gland histology.
  • The study concluded that the Pfizer vaccination had the most T cells and the highest serum concentrations of IgG and IgA.
  • The research has been peer-reviewed and has been published in the Journal of Stomatology, Oral and Maxillofacial Surgery.

Statistics:

  • 40 rats were allocated into four groups: group I (control), group II (Pfizer), group III (Sinovac), and group IV (Influenza tetra).
  • The Pfizer group had the highest mean IgG and IgA readings, with 1.2 and 1.5 times the values of the control group, respectively.
  • The area percentage of CD3 immunoexpression in the Pfizer group was 85.2%, compared to 65.1% in the Sinovac group and 55.3% in the Influenza group.

Sources:

  • Journal of Stomatology, Oral and Maxillofacial Surgery, 2025:102393
  • Cairo University Reports Findings in COVID-19 (Comparing the immune response of mRNA-based, inactivated COVID-19 and seasonal influenza vaccines and their effects on submandibular glands and associated lymph nodes in albino rats: biochemical, histological and immunohistochemical analysis)
  • Chemicals & Chemistry, May 16, 2025; p 1
  • NewsRx LLC, "Cairo University Reports Findings in COVID-19 (Comparing the immune response of mRNA-based, inactivated COVID-19 and seasonal influenza vaccines and their effects on submandibular glands and associated lymph nodes in albino rats: biochemical, histological and immunohistochemical analysis)"

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