Back to Search
Start Over
Immunogenicity and safety of primary fractional-dose yellow fever vaccine in autoimmune rheumatic diseases
- Source :
- PLoS Neglected Tropical Diseases, PLoS Neglected Tropical Diseases, Vol 15, Iss 11, p e0010002 (2021)
- Publication Year :
- 2021
- Publisher :
- Public Library of Science (PLoS), 2021.
-
Abstract
- Background Brazil faced a yellow fever(YF) outbreak in 2016–2018 and vaccination was considered for autoimmune rheumatic disease patients(ARD) with low immunosuppression due to YF high mortality. Objective This study aimed to evaluate, prospectively for the first time, the short-term immunogenicity of the fractional YF vaccine(YFV) immunization in ARD patients with low immunossupression. Methods and Results A total of 318 participants(159 ARD and 159 age- and sex-matched healthy controls) were vaccinated with the fractional-dose(one fifth) of 17DD-YFV. All subjects were evaluated at entry(D0), D5, D10, and D30 post-vaccination for clinical/laboratory and disease activity parameters for ARD patients. Post-vaccination seroconversion rate(83.7%vs.96.6%, p = 0.0006) and geometric mean titers(GMT) of neutralizing antibodies[1143.7 (95%CI 1012.3–1292.2) vs.731 (95%CI 593.6–900.2), p0.05). Conclusion Fractional-dose 17DD-YF vaccine in ARD patients resulted in a high rate of seroconversion rate(>80%) but lower than controls, with a longer but less intense viremia. This vaccine was immunogenic, safe and did not induce flares in ARD under low immunosuppression and may be indicated in YF outbreak situations and for patients who live or travel to endemic areas. Trial registration This clinical trial was registered with Clinicaltrials.gov (#NCT03430388).<br />Author summary Yellow fever is a viral hemorragic fever with high mortality rate and the vaccine is a remarkably successful way of preventing it. As a live attenuated virus vaccine, it is not recommended for rheumatic and other immunossupressed patients in general. However, in an outbreak scenario, the risk of dying of the disease can be higher than the risk of a vaccine serious adverse event. In 2018, the fractional-dose yellow fever vaccine was offered to the hospital employees and to the rheumatic patients without or with low immunossupression therapy in Hospital das Clinicas of University of São Paulo, during the yellow fever outbreak in São Paulo, Brazil. In order to optimize the yellow fever vaccine (YFV) supply, the fractional-dose (corresponding to one fifth) was adopted in the public vaccine campaign. This is the first study evaluating the primary vaccination with fractional-dose YFV in autoimmune rheumatic diseases(ARD) patients (n = 159) under low immunosuppression. Most vaccinated participants were able to produce enough neutralizing antibodies to be protected against yellow fever (seroconversion rate of 84% versus 96% in healthy controls). Neither activity of the rheumatic disease or serious adverse event was identified during the 30 days of followup after the vaccination.
- Subjects :
- Male
Viral Diseases
Physiology
medicine.medical_treatment
RC955-962
Antibodies, Viral
Biochemistry
Medical Conditions
Arctic medicine. Tropical medicine
Immune Physiology
Medicine and Health Sciences
Public and Occupational Health
Prospective Studies
Vaccines
Immune System Proteins
Immunogenicity
Viral Vaccine
Yellow Fever Vaccine
Immunosuppression
Viral Load
Middle Aged
Vaccination and Immunization
Vaccination
Infectious Diseases
Research Design
Seroconversion
Female
Public aspects of medicine
RA1-1270
Brazil
Research Article
medicine.drug
Adult
medicine.medical_specialty
Infectious Disease Control
Clinical Research Design
Immunology
Yellow fever vaccine
Research and Analysis Methods
Microbiology
Young Adult
Rheumatology
Virology
Rheumatic Diseases
Internal medicine
Yellow Fever
medicine
Humans
Viremia
Antigens
Adverse effect
Immunosuppression Therapy
business.industry
Public Health, Environmental and Occupational Health
Biology and Life Sciences
Proteins
Outbreak
Viral Vaccines
Antibodies, Neutralizing
Preventive Medicine
Adverse Events
business
Viral Transmission and Infection
Subjects
Details
- ISSN :
- 19352735
- Volume :
- 15
- Database :
- OpenAIRE
- Journal :
- PLOS Neglected Tropical Diseases
- Accession number :
- edsair.doi.dedup.....95e41eab6c78c225d8af1dbe32b10def