Active Surveillance for Adverse Events Following Immunization With the Influenza Vaccine Produced at Butantan Institute

NCT ID: NCT03057483

Last Updated: 2018-01-17

Basic Information

• Recruitment Status: COMPLETED
• Total Enrollment: 533 participants
• Study Classification: OBSERVATIONAL
• Study Start Date: 2017-04-06
• Study Completion Date: 2017-12-06

Brief Summary

Rationale and background: Since 2013, IB has been performing passive pharmacovigilance activities related to TIV. Objetive: To implement an active surveillance study as part of our pharmacovigilance plan while passive surveillance activities will continue. Pharmacovigilance data on TIV, via active surveillance, is being implemented in response to WHO requirements for pre-qualification of TIV.

Study Design: This is a prospective cohort study. Population: Target groups for vaccination defined by The National Immunization Program of Brazil: children between six months and five years old; pregnant women; postpartum women (mothers until 45 days after birth); healthcare workers; and elderly (people over 60 years old). Study Size: A total of 900 individuals (300 health care workers, 300 elderly, 100 pregnant women, 100 post-partum women and 100 children between six months and five years old), presenting for immunization with IB TIV, and who agree to participate after providing Informed Consent.

Data Analyses: Descriptive approaches will be used to meet the defined objectives described in the protocol, as well as formal statistical tests when appropriate.

Detailed Description

Primary objective: to characterize and estimate the incidence of solicited adverse events following immunization (AEFI) associated with administration of the trivalent influenza vaccine produced at Butantan Institute (TIV).

Secondary objectives: 1) to characterize and estimate the incidence of overall (solicited and unsolicited) AEFI associated with administration of TIV; 2) to characterize and estimate the incidence of unsolicited AEFI associated with administration of TIV.

Study Design: This is a prospective cohort study aimed at identifying and evaluating adverse events following immunization among individuals vaccinated with TIV during the national immunization campaign. The design will include active surveillance by phone contact and through visits to the study site. Health facilities will be designated and set up as sentinel sites to enroll individuals being vaccinated with IB TIV for active follow up of solicited AEFI occurring within the first 14 days post-vaccination, and unsolicited AEFI up to 6 weeks post-vaccination.

Population: The following groups are targeted groups for the national immunization campaign and will be recruited for participation in this study:

• children between six months and five years old;
• pregnant women; postpartum women (mothers until 45 days after birth);
• healthcare workers; and
• elderly (people over 60 years old).

Variables: Solicited AEFI to be monitored will include local reactions (erythema, pain, swelling, ecchymosis, pruritus and induration), systemic reactions (headache, fever, malaise, arthralgia, myalgia, rash, chills, pruritus, fatigue, sweating) and irritability and persistent crying (for children than 6 years). Unsolicited AEFI reported over the period up to 6 weeks post-vaccination will be recorded. All adverse events reported in the study will be MedDRA coded. Other variables of interest in the study are demographic information of study participants: date of birth, gender, age, ethnicity, as well as vaccination information including date of immunization, site, and vaccine lot.

Data Sources: Study information including signs and symptoms following immunization with TIV will be recorded daily for 14 days post immunization, and will be recorded in the participant's study file.

Study Size: A total of 900 individuals (300 health care workers, 300 elderly, 100 pregnant women, 100 post-partum women and 100 children between six months and five years old), presenting for immunization with IB TIV, and who agree to participate after providing Informed Consent, will be enrolled in the study by study staff.

Data Analyses: Descriptive approaches will be used to meet the defined objectives described in the protocol, as well as formal statistical tests when appropriate. Incidence rates (IR) of AEFI with TIV will be calculated as the number of events divided by the total number of participants exposed to TIV in each of the targeted groups over the period of follow up. IR will be calculated based on total person time of follow-up, 95% confidence intervals will be calculated.

Conditions

Influenza Vaccines

Study Design

• Observational Model Type: COHORT
• Study Time Perspective: PROSPECTIVE

Study Groups

Elderly

People over 60 years of age. seasonal influenza vaccine

Seasonal Influenza vaccine

Intervention Type: BIOLOGICAL

Seasonal Influenza vaccine

Health care workers

People working in health care services seasonal influenza vaccine

Seasonal Influenza vaccine

Intervention Type: BIOLOGICAL

Seasonal Influenza vaccine

Pregnant women

Pregnant women seasonal influenza vaccine

Seasonal Influenza vaccine

Intervention Type: BIOLOGICAL

Seasonal Influenza vaccine

Post partum women

Women who have given birth \< 45 days seasonal influenza vaccine

Seasonal Influenza vaccine

Intervention Type: BIOLOGICAL

Seasonal Influenza vaccine

Children

Children from 6 months to 5 years of age seasonal influenza vaccine

Seasonal Influenza vaccine

Intervention Type: BIOLOGICAL

Seasonal Influenza vaccine

Interventions

Seasonal Influenza vaccine

Seasonal Influenza vaccine

Intervention Type: BIOLOGICAL

Other Intervention Names

Flu vaccine

Eligibility Criteria

Inclusion Criteria

• Children between six months and five years old; or
• Pregnant and postpartum women (mothers until 45 days after birth); or
• Health care workers; or
• Elderly (aged 60 years or more); and
• To have indication to be vaccinated against influenza;
• To be available to participate in the study throughout its duration (6 weeks after any vaccine dose administered); and
• Demonstrates interest to participate in the study as registered in the informed consent form (ICF).

Exclusion Criteria

• Known systemic hypersensitivity to eggs or to any component of the vaccine;
• Suspected or confirmed fever in the 3 days prior to vaccination or axillary temperature greater than 37.8 ° C on the day of vaccination;
• History of severe adverse reaction after previous administration of an Influenza vaccine within 6 weeks following vaccination;
• History of Guillain-Barre Syndrome or other demyelinating disease;
• Behavioral, cognitive or psychiatric disease that in the opinion of the principal investigator or his representative physician, affects the participant ability to understand and cooperate with all study protocol requirements;
• Any other condition in the opinion of the investigator that justifies exclusion from participation.

• Minimum Eligible Age: 6 Months
• Maximum Eligible Age: 59 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Butantan Institute

OTHER_GOV

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Lily Weckx, MD

Role: PRINCIPAL_INVESTIGATOR

Federal University of São Paulo

Locations

UBS Buritis

Boa Vista, Roraima, Brazil

Crie - Unifesp

São Paulo, São Paulo, Brazil

Countries

Brazil

References

Gattas VL, Braga PE, Koike ME, Lucchesi MBB, Oliveira MMM, Piorelli RO, Queiroz V, Precioso AR. Safety assessment of seasonal trivalent influenza vaccine produced by Instituto Butantan from 2013 to 2017. Rev Inst Med Trop Sao Paulo. 2018 Dec 20;61:e4. doi: 10.1590/S1678-9946201961004.

Reference Type: DERIVED

PMID: 30570077 (View on PubMed)

Other Identifiers

FLU-05-IB

Identifier Type: -

Identifier Source: org_study_id