Covid-19 Vaccine Effectiveness in Healthcare Personnel in Clalit Health Services in Israel (CoVEHPI)

Overview

Although clinical trials for approved COVID-19 vaccines demonstrated efficacy of the vaccine in preventing symptomatic infection, many questions about vaccine effectiveness, such as the effectiveness of COVID-19 vaccine in preventing asymptomatic infection, a surrogate for transmission, and duration of protection, can only be evaluated in real-world trials. The objective of the study is to evaluate COVID-19 vaccine effectiveness (Pfizer vaccine, and, if available, Moderna vaccine) in preventing infection in healthcare personnel in Israel. HCP who are Clalit members and working in Soroka, Beilinson, Meir, Haemek, Kaplan and Schneider hospitals, 18 years or older, and eligible to get COVID-19 vaccine according to Ministry of Health guidelines, will be recruited, regardless of their intention to get the COVID-19 vaccine. A baseline serology sample and respiratory sample will be collected. Participants will be asked to provide a respiratory sample weekly for 3 months, and then monthly for the remainder of the study. Participants will also have blood drawn at 1 month, 3 months, 6 months, 9 months and 12 months. Respiratory samples will be tested for SARS-CoV-2 by RT-PCR; serology will be tested for SARS-CoV-2 antibodies. The study will last for 12 months. For each participant, data will be extracted from the Electronic Medical Record for the period of the study and retrospectively from 2010.

Full Title of Study: “Covid-19 Vaccine Effectiveness in Healthcare Personnel in Clalit Health Services in Israel (CoVEHPI): A Prospective Cohort Study”

Study Type

  • Study Type: Observational
  • Study Design
    • Time Perspective: Prospective
  • Study Primary Completion Date: June 30, 2021

Interventions

  • Diagnostic Test: Serologic test
    • A blood test to check antibodies type and amount
  • Diagnostic Test: Respiratory swabs
    • PCR test to Covid-19

Arms, Groups and Cohorts

  • vaccinated
    • participants who received the Covid-19 vaccine
  • unvaccinated
    • participants who didn’t received the Covid-19 vaccine

Clinical Trial Outcome Measures

Primary Measures

  • COVID-19 vaccine effectiveness (VE)
    • Time Frame: 18 months
    • Incidence of SARS-CoV-2 infections in healthcare workers vaccinated with COVID-19 vaccine compared to unvaccinated healthcare workers

Secondary Measures

  • Symptomatic SARS-CoV-2 infection in vaccinated vs. unvaccinated healthcare workers
    • Time Frame: 18 months
    • Incidence of symptomatic SARS-CoV-2 infections in healthcare workers vaccinated with COVID-19 vaccine compared to unvaccinated healthcare workers
  • asymptomatic SARS-CoV-2 infection in vaccinated vs. unvaccinated healthcare workers
    • Time Frame: 18 months
    • Incidence of symptomatic SARS-CoV-2 infections in healthcare workers vaccinated with COVID-19 vaccine compared to unvaccinated healthcare workers
  • Duration of effectiveness of the vaccine
    • Time Frame: 18 months
    • Incidence of SARS-CoV-2 infections in healthcare workers vaccinated with COVID-19 vaccine compared to unvaccinated healthcare workers over different periods of time
  • Vaccine Effectiveness by age
    • Time Frame: 18 months
    • Incidence of SARS-CoV-2 infections in healthcare workers vaccinated with COVID-19 vaccine compared to unvaccinated healthcare workers of different age groups
  • Vaccine Effectiveness by comorbidity
    • Time Frame: 18 months
    • Incidence of SARS-CoV-2 infections in healthcare workers vaccinated with COVID-19 vaccine compared to unvaccinated healthcare workers by various underly medical conditions
  • Vaccine effectiveness in persons previously infected with SARS-CoV-2 virus
    • Time Frame: 18 months
    • Incidence of SARS-CoV-2 infections in previously infection healthcare workers vaccinated with COVID-19 vaccine compared to previously infection unvaccinated healthcare workers
  • VE by degree of exposure to COVID-19 patients
    • Time Frame: 18 months
    • Incidence of SARS-CoV-2 infections in healthcare workers vaccinated with COVID-19 vaccine compared to unvaccinated healthcare workers by degree of occupational exposure to COVID-019 patients
  • VE by different SARS-CoV-2 variants
    • Time Frame: 18 months
    • Incidence of SARS-CoV-2 infections in healthcare workers vaccinated with COVID-19 vaccine compared to unvaccinated healthcare workers for different variant strains of SARS-CoV-2
  • Vaccine effectiveness of one dose compared to two doses
    • Time Frame: 18 months
    • Incidence of SARS-CoV-2 infections in healthcare workers vaccinated with two doses of COVID-19 vaccine compared to healthcare workers vaccinated with two doses of COVID-19 vaccine
  • Compartive vaccine Effectiveness of different vaccine brands
    • Time Frame: 18 months
    • Incidence of SARS-CoV-2 infections in healthcare workers vaccinated with different brands of COVID-19 vaccine

Participating in This Clinical Trial

Inclusion Criteria

  • Any HCP at any of the participating hospitals who is – a member of Clalit Health Services – is eligible to get the Covid-19 vaccine – did not receive the first dose of COVID-19 vaccine more than 21 days prior to the enrollment date Exclusion Criteria:

- Employees at any of the participating hospitals will be excluded if they are:

  • not a member of Clalit Health Services; or – not eligible to get the Covid-19 vaccine according to the Ministry of Health guidelines; or – Less than 18 years of age – Received first dose of COVID-19 vaccine more than 21 days prior to date of enrollment

Gender Eligibility: All

Minimum Age: 18 Years

Maximum Age: 120 Years

Are Healthy Volunteers Accepted: Accepts Healthy Volunteers

Investigator Details

  • Lead Sponsor
    • Clalit Health Services
  • Provider of Information About this Clinical Study
    • Principal Investigator: Ran Balicer, Chief Innovation Officer, Clalit Health Services – Clalit Health Services

Clinical trials entries are delivered from the US National Institutes of Health and are not reviewed separately by this site. Please see the identifier information above for retrieving further details from the government database.

At TrialBulletin.com, we keep tabs on over 200,000 clinical trials in the US and abroad, using medical data supplied directly by the US National Institutes of Health. Please see the About and Contact page for details.