Six-month efficacy and toxicity profile of bnt162b2 vaccine in cancer patients with solid tumors

Ithai Waldhorn, Roy Holland, Tal Goshen-Lago, Yelena Shirman, Moran Szwarcwort-Cohen, Anat Reiner-Benaim, Yael Shachor-Meyouhas, Khetam Hussein, Liana Fahoum, Avivit Peer, Ronit Almog, Yuval Shaked, Michael Halberthal, Irit Ben-Aharon

Research output: Contribution to journalArticlepeer-review


We had previously reported short-term efficacy, immunogenicity, and safety of the BNT162b2 vaccine among cancer patients with solid tumors. We aimed to evaluate these outcomes at six months postvaccination. The study cohort comprised patients who were on treatment during vaccination and throughout six months postvaccination. Serologic tests were performed after second vaccination and six months afterward. An age-matched cohort of health care workers served as controls. Documentation of COVID-19 infection, blood tests, and imaging studies during the study period was reviewed. Participants included 154 patients and 135 controls. Six months postvaccination, 122 (79%) patients were seropositive compared with 114 (84%) controls (P = 0.32). Serology titer dramatically decreased in a similar manner in both cohorts. No COVID-19 cases were documented in controls, and one case occurred in patient cohort. All previously reported adverse effects resolved. Taken together, the pattern of immunogenicity, efficacy, and safety of BNT162b2 in patients with cancer with solid tumors at six months postvaccination resembles that of the general population. Significance: Evidence regarding efficacy and safety of COVID-19 vaccines in patients with cancer indicate a favorable short-term profile. Immunomodulation due to anticancer treatments may affect immunity and immunogenicity of patients with cancer to the BNT162b2 vaccine over time. Our study sheds light on these long-term outcomes and portrays a trend that resembles the general population.

Original languageEnglish
Pages (from-to)2430-2435
Number of pages6
JournalCancer Discovery
Issue number10
StatePublished - Oct 2021
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2021 American Association for Cancer Research.


  • Adult
  • Aged
  • Aged, 80 and over
  • BNT162 Vaccine
  • COVID-19 Vaccines/administration & dosage
  • Health Personnel
  • Humans
  • Male
  • Middle Aged
  • Neoplasms/drug therapy
  • Neutropenia/chemically induced
  • Thrombocytopenia/chemically induced
  • Time-to-Treatment
  • Vaccination

ASJC Scopus subject areas

  • Oncology


Dive into the research topics of 'Six-month efficacy and toxicity profile of bnt162b2 vaccine in cancer patients with solid tumors'. Together they form a unique fingerprint.

Cite this