{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,20]],"date-time":"2026-05-20T22:31:34Z","timestamp":1779316294461,"version":"3.51.4"},"reference-count":25,"publisher":"American Medical Association (AMA)","issue":"2","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JAMA Oncol"],"published-print":{"date-parts":[[2023,2,1]]},"abstract":"<jats:sec id=\"ab-coi220078-4\"><jats:title>Importance<\/jats:title><jats:p>Accurate identification of patient groups with the lowest level of protection following COVID-19 vaccination is important to better target resources and interventions for the most vulnerable populations. It is not known whether SARS-CoV-2 antibody testing has clinical utility for high-risk groups, such as people with cancer.<\/jats:p><\/jats:sec><jats:sec id=\"ab-coi220078-5\"><jats:title>Objective<\/jats:title><jats:p>To evaluate whether spike protein antibody vaccine response (COV-S) following COVID-19 vaccination is associated with the risk of SARS-CoV-2 breakthrough infection or hospitalization among patients with cancer.<\/jats:p><\/jats:sec><jats:sec id=\"ab-coi220078-6\"><jats:title>Design, Setting, and Participants<\/jats:title><jats:p>This was a population-based cross-sectional study of patients with cancer from the UK as part of the National COVID Cancer Antibody Survey. Adults with a known or reported cancer diagnosis who had completed their primary SARS-CoV-2 vaccination schedule were included. This analysis ran from September 1, 2021, to March 4, 2022, a period covering the expansion of the UK\u2019s third-dose vaccination booster program.<\/jats:p><\/jats:sec><jats:sec id=\"ab-coi220078-7\"><jats:title>Interventions<\/jats:title><jats:p>Anti\u2013SARS-CoV-2 COV-S antibody test (Elecsys; Roche).<\/jats:p><\/jats:sec><jats:sec id=\"ab-coi220078-8\"><jats:title>Main Outcomes and Measures<\/jats:title><jats:p>Odds of SARS-CoV-2 breakthrough infection and COVID-19 hospitalization.<\/jats:p><\/jats:sec><jats:sec id=\"ab-coi220078-9\"><jats:title>Results<\/jats:title><jats:p>The evaluation comprised 4249 antibody test results from 3555 patients with cancer and 294\u202f230 test results from 225\u202f272 individuals in the noncancer population. The overall cohort of 228\u202f827 individuals (patients with cancer and the noncancer population) comprised 298\u202f479 antibody tests. The median age of the cohort was in the age band of 40 and 49 years and included 182\u202f741 test results (61.22%) from women and 115\u202f737 (38.78%) from men. There were 279\u202f721 tests (93.72%) taken by individuals identifying as White or White British. Patients with cancer were more likely to have undetectable anti-S antibody responses than the general population (199 of 4249 test results [4.68%] vs 376 of 294\u202f230 [0.13%]; <jats:italic>P<\/jats:italic>\u2009&amp;amp;lt;\u2009.001). Patients with leukemia or lymphoma had the lowest antibody titers. In the cancer cohort, following multivariable correction, patients who had an undetectable antibody response were at much greater risk for SARS-CoV-2 breakthrough infection (odds ratio [OR], 3.05; 95% CI, 1.96-4.72; <jats:italic>P<\/jats:italic>\u2009&amp;amp;lt;\u2009.001) and SARS-CoV-2\u2013related hospitalization (OR, 6.48; 95% CI, 3.31-12.67; <jats:italic>P<\/jats:italic>\u2009&amp;amp;lt;\u2009.001) than individuals who had a positive antibody response.<\/jats:p><\/jats:sec><jats:sec id=\"ab-coi220078-10\"><jats:title>Conclusions and Relevance<\/jats:title><jats:p>The findings of this cross-sectional study suggest that COV-S antibody testing allows the identification of patients with cancer who have the lowest level of antibody-derived protection from COVID-19. This study supports larger evaluations of SARS-CoV-2 antibody testing. Prevention of SARS-CoV-2 transmission to patients with cancer should be prioritized to minimize impact on cancer treatments and maximize quality of life for individuals with cancer during the ongoing pandemic.<\/jats:p><\/jats:sec>","DOI":"10.1001\/jamaoncol.2022.5974","type":"journal-article","created":{"date-parts":[[2022,12,22]],"date-time":"2022-12-22T16:34:24Z","timestamp":1671726864000},"page":"188","source":"Crossref","is-referenced-by-count":30,"title":["Association of SARS-CoV-2 Spike Protein Antibody Vaccine Response With Infection Severity in Patients With Cancer"],"prefix":"10.1001","volume":"9","author":[{"given":"Lennard Y. 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