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A recent randomized controlled trial (RCT) from our group has demonstrated safety and immune response (both humoral and cell-mediated) of the live-attenuated herpes zoster (HZ) vaccine (Zostavax) in stable systemic lupus erythematosus (SLE) patients with a previous history of HZ or varicella infection. An important research question is whether the immunogenicity of the HZ vaccine in SLE patients is long-lasting. There is no information in the literature regarding the long-term immunogenicity and safety of Zostavax in SLE patients. This prompts the current extension study which is planned to evaluate the long-term immunogenicity and efficacy of Zostavax in our original patient cohort.
A recent RCT from our group has demonstrated safety and immune response (both humoral and cell-mediated) of the live-attenuated Zostavax in stable SLE patients with a previous history of HZ or varicella infection. An important research question is whether the immunogenicity of the HZ vaccine in SLE patients is long-lasting. There is no information in the literature regarding the long-term immunogenicity and safety of the HZ vaccine, Zostavax, in SLE patients.
Patients who had completed the original RCT and had been followed for 4 years since HZ vaccination or placebo injection were invited to participate in this extension study. Blood samples will be taken for a repeat assessment of the humoral and cell-mediated response to VZV at 4 years.
Outcomes of interest Primary outcome Difference between the two groups in the proportion of patients who have a persistent and 50% increase in IgG to VZV (humoral response to Zostavax) at 4 years compared to baseline Secondary outcomes
1. Difference between the two groups in the cell-mediated response to Zostavax at 4 years as compared to baseline
2. Vaccine efficacy - difference in the rate of clinical HZ reactivation between two groups of patients at 4 years
3. Vaccine safety - difference between the two groups in terms of SLE flares and new autoimmune phenomena at 4 years
Department of Medicine, Tuen Mun Hospital
Not yet recruiting
Tuen Mun Hospital
Published on BioPortfolio: 2019-09-19T03:56:38-0400
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A vaccine is a biological preparation that improves immunity to a particular disease. A vaccine typically contains an agent that resembles a disease-causing microorganism, and is often made from weakened or killed forms of the microbe, its toxins or one ...