COVID-19 vaccination and breakthrough infections in patients with cancer.

BACKGROUND

Vaccination is an important preventive health measure to protect against symptomatic and severe COVID-19. Impaired immunity secondary to an underlying malignancy or recent receipt of antineoplastic systemic therapies can result in less robust antibody titers following vaccination and possible risk of breakthrough infection. As clinical trials evaluating COVID-19 vaccines largely excluded patients with a history of cancer and those on active immunosuppression (including chemotherapy), limited evidence is available to inform the clinical efficacy of COVID-19 vaccination across the spectrum of patients with cancer.

PATIENTS AND METHODS

We describe the clinical features of patients with cancer who developed symptomatic COVID-19 following vaccination and compare weighted outcomes with those of contemporary unvaccinated patients, after adjustment for confounders, using data from the multi-institutional COVID-19 and Cancer Consortium (CCC19).

RESULTS

Patients with cancer who develop COVID-19 following vaccination have substantial comorbidities and can present with severe and even lethal infection. Patients harboring hematologic malignancies are over-represented among vaccinated patients with cancer who develop symptomatic COVID-19.

CONCLUSIONS

Vaccination against COVID-19 remains an essential strategy in protecting vulnerable populations, including patients with cancer. Patients with cancer who develop breakthrough infection despite full vaccination, however, remain at risk of severe outcomes. A multilayered public health mitigation approach that includes vaccination of close contacts, boosters, social distancing, and mask-wearing should be continued for the foreseeable future.

Informations de copyright

Copyright © 2021 The Author(s). Published by Elsevier Ltd.. All rights reserved.

Déclaration de conflit d'intérêts

Disclosure ALS reports non-financial support from Astellas, non-financial support from Pfizer, outside the submitted work. CL reports research support from Genentech/imCORE, outside the submitted work. ZB reports non-financial support from Bristol Myers Squibb, grants from Genentech/imCORE, personal fees from UpToDate, outside the submitted work. CYH reports personal fees from NashBio, outside the submitted work. SAB reports personal fees from Exelixis, personal fees from Seattle Genetics, personal fees from Pfizer, personal fees from Bristol Myers Squibb, outside the submitted work. CRF reports research grants from the Merck Foundation and National Comprehensive Cancer Network (NCCN)/Pfizer, outside the submitted work. EAG reports personal fees and other from Alexion Pharmaceuticals, personal fees and non-financial support from Novartis Pharmaceuticals, personal fees, non-financial support and other from Astex/Otsuka Pharmaceuticals, other from Apellis Pharmaceuticals, personal fees, non-financial support, and other from Celgene/Bristol Myers Squibb, grants and personal fees from AbbVie/Genentech, other from Celldex Therapeutics, personal fees from Boston Biomedical, outside the submitted work. JEH reports research funding paid to her institution from Dendreon Pharmaceuticals LLC, research funding paid to her institution from Regeneron Pharmaceuticals, personal fees from Genzyme, personal fees from Seagen, outside the submitted work. RRM reports grants and personal fees from Bayer, grants from Pfizer, grants from Tempus, personal fees from AVEO, personal fees from Caris, personal fees from Bristol Myers Squib, personal fees from Exelixis, personal fees from Janssen, personal fees from Novartis, personal fees from Pfizer, personal fees from Sanofi, personal fees from Tempus, personal fees from Dendreon, personal fees from Vividion, personal fees from AstraZeneca, personal fees from Calithera, personal fees from Merck, outside the submitted work. OAP reports personal fees from International Consulting Associates, Inc., outside the submitted work. EMW-B reports personal fees from Astellas, personal fees from AVEO Oncology, personal fees from Bristol Myers Squibb, other from Exelixis, grants from Pfizer Global Medical Grants, other from Nektar, other from Immunomedics, outside the submitted work. SM reports personal fees from National Geographic, outside the submitted work. DF reports a grant from Merck to study COVID-19 in immunocompromised patients, outside of the submitted work. YS reports personal fees from Novartis, personal fees from Roche, personal fees from Pfizer, personal fees from Janssen, personal fees from Eisai, personal fees from AstraZeneca, outside of the submitted work. JLW reports personal fees from Westat, personal fees from Roche, personal fees from Melax Tech, personal fees from Flatiron Health, other from HemOnc.org LLC (ownership), outside the submitted work. TKC reports institutional and personal, paid and unpaid support for research, advisory boards, consultancy, and honoraria from AstraZeneca, Aravive, Aveo, Bayer, Bristol Myers Squibb, Eisai, EMD Serono, Exelixis, GlaxoSmithKline, IQVIA, Ipsen, Kanaph, Lilly, Merck, Nikang, Novartis, Pfizer, Roche, Sanofi/Aventis, Takeda, Tempest, UpToDate, CME events (Peerview, OncLive and others), outside the submitted work. All other authors have declared no conflicts of interest.