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Updated: Sep 20, 2025

Generation of a Novel Dendritic-cell Vaccine Using Melanoma and Squamous Cancer Stem Cells
Published on: January 6, 2014
Solid cancer patients achieve adequate immunogenicity and low rate of severe adverse events after SARS-CoV-2
Urska Janzic1,2, Urska Bidovec-Stojkovic3, Katja Mohorcic1
1Department of Medical Oncology, University Clinic of Respiratory & Allergic Diseases Golnik, Golnik, 4204, Slovenia.
Abstract:
Background: SARS-CoV-2 vaccination in cancer patients is crucial to prevent severe COVID-19 disease course. Methods: This study assessed immunogenicity of cancer patients on active treatment receiving mRNA-based SARS-CoV-2 vaccine by detection of anti-SARS-CoV-2 S1 IgG antibodies in serum, before, after the first and second doses and 3 months after a complete primary course of vaccination. Results were compared with healthy controls. Results: Of 112 patients, the seroconversion rate was 96%. A significant reduction in antibody levels was observed 3 months after vaccination in patients receiving immune checkpoint inhibitors versus control participants (p < 0.001). Adverse events were mostly mild. Conclusion: Immunogenicity after mRNA-based vaccine in cancer patients is adequate but influenced by the type of anticancer therapy. Antibody levels decline after 3 months, and thus a third vaccination is warranted.
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