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Trial registered on ANZCTR
Registration number
ACTRN12619000184178p
Ethics application status
Submitted, not yet approved
Date submitted
2/02/2019
Date registered
8/02/2019
Date last updated
8/02/2019
Date data sharing statement initially provided
8/02/2019
Type of registration
Prospectively registered
Titles & IDs
Public title
Immunogenicity of oral polio vaccine in different doses in Mozambique
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Scientific title
Comparison of Immunogenicity of mOPV2 administered as 1-drop or 2-drop oral dose to infants in Mocuba district, Mozambique, 2019
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Secondary ID [1]
297279
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None
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Universal Trial Number (UTN)
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Trial acronym
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
poliomyelitis
311357
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Condition category
Condition code
Infection
309993
309993
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0
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Other infectious diseases
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Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
Study arm A: one drop (reduced dose=0.05 mL) of monovalent oral poliovirus vaccine type 2 (mOPV2), containing half of 10^5 +/- 0.5 log TCID 50 (50% Tissue culture Infective Dose) of type 2 Sabin virus
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Intervention code [1]
313531
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Treatment: Drugs
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Intervention code [2]
313580
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Prevention
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Comparator / control treatment
Study arm B: two drops (normal dose=0.1 mL) of monovalent oral poliovirus vaccine type 2 (mOPV2) containing 10^5 +/- 0.5 log TCID 50 (50% Tissue culture Infective Dose) of type 2 Sabin virus
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Control group
Dose comparison
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Outcomes
Primary outcome [1]
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Seroconversion after one full or reduced dose of mOPV2 expressed by increase in poliovirus type 2 antibodies assessed by neutralization assay test of sera
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Assessment method [1]
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Timepoint [1]
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Comparison of proportion of children who seroconverted 14 days after one or two drops of mOPV2 vaccine
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Secondary outcome [1]
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Titre of poliovirus type 2 neutralizing antibodies after one or two drops of mOPV2 assessed by neutralization assay test of sera
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Assessment method [1]
366373
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Timepoint [1]
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14 days after intervention
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Eligibility
Key inclusion criteria
healthy child between 9-22 months of age living in study area
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Minimum age
9
Months
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Maximum age
22
Months
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Sex
Both males and females
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Can healthy volunteers participate?
Yes
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Key exclusion criteria
no consent
residence outside of study area
known immunodeficiency
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Study design
Purpose of the study
Prevention
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Allocation to intervention
Randomised controlled trial
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Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
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Methods used to generate the sequence in which subjects will be randomised (sequence generation)
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Masking / blinding
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Who is / are masked / blinded?
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Intervention assignment
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Other design features
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Phase
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Type of endpoint/s
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Statistical methods / analysis
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Recruitment
Recruitment status
Not yet recruiting
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Date of first participant enrolment
Anticipated
18/02/2019
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Actual
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Date of last participant enrolment
Anticipated
22/02/2019
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Actual
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Date of last data collection
Anticipated
30/03/2019
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Actual
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Sample size
Target
360
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Accrual to date
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Final
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Recruitment outside Australia
Country [1]
21242
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Mozambique
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State/province [1]
21242
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Funding & Sponsors
Funding source category [1]
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Other
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Name [1]
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World Health Organization
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Address [1]
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20 Appia Avenue, 1211 Geneva
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Country [1]
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Switzerland
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Primary sponsor type
Other
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Name
WHO
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Address
20 Appia Avenue, 1211 Geneva
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Country
Switzerland
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Secondary sponsor category [1]
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None
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Name [1]
301581
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Address [1]
301581
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Country [1]
301581
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Ethics approval
Ethics application status
Submitted, not yet approved
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Ethics committee name [1]
302538
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WHO Ethics Review Committee
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Ethics committee address [1]
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20 Appia Avenue, 1211 Geneva
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Ethics committee country [1]
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Switzerland
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Date submitted for ethics approval [1]
302538
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12/12/2018
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Approval date [1]
302538
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Ethics approval number [1]
302538
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Summary
Brief summary
The attenuated poliovirus strains contained in oral polio vaccine (OPV) can re-acquire the neurovirulence and transmissibility of wild poliovirus in populations with low immunity. Because of the significant burden in paralytic cases caused by outbreaks of circulating vaccine-derived poliovirus (cVDPV), it was decided to switch from trivalent to bivalent OPV containing only type 1 and 3 polioviruses, and incorporate a dose of inactivated poliovirus vaccine (IPV) in routine immunization schedules. Type 2 monovalent OPV (mOPV2) was reserved for use in response to potential VDPV2 outbreaks after the tOPV-bOPV switch in April 2016. Unfortunately, the number and size of VDPV2 outbreaks observed after the switch has exceeded expectations and the mOPV2 available in the stockpile may be insufficient. A potential solution to stretch the mOPV2 stockpile would be giving 1 drop instead of the conventional 2 drops. The recommended content of Sabin poliovirus in a 2-drop dose of mOPV2 is at least 105 TCID50, but most batches include 2-4 times the minimum recommended amount. Therefore, half the dose of mOPV2 (i.e. 1 drop) could still induce appropriate immunogenicity. However, policy makers need clinical trials among children naïve to type 2 OPV before recommending a reduction in mOPV2 dose and trials can only be done in countries where mOPV2 can be legally used, which is those experiencing a VDPV2 outbreak, such as Mozambique. We will conduct a clinical trial in Mocuba district, Zambezia, Mozambique that will compare the immunogenicity against type 2 poliovirus of one drop versus two drops of mOPV2. The results of this study will guide the Global Polio Eradication to develop strategies that prevent a devastating shortage in mOPV2.
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Trial website
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Trial related presentations / publications
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Public notes
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Contacts
Principal investigator
Name
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Dr Nilsa de Deus
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Address
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Department of Research
Instituto Nacional de Saude (INS), Mozambique
Vila de Marracuene
Estrada Nacional N°1, Parcela N°3943
Província de Maputo
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Country
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Mozambique
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Phone
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+258 21430814
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Fax
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Email
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[email protected]
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Contact person for public queries
Name
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Ondrej Mach
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Address
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World Health Organization
20 Appia Avenue, 1211 Geneva
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Country
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Switzerland
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Phone
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+41227911863
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Fax
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Email
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[email protected]
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Contact person for scientific queries
Name
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Ondrej Mach
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Address
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World Health Organization
20 Appia Avenue, 1211 Geneva
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Country
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Switzerland
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Phone
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+41227911863
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Fax
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Email
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[email protected]
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Data sharing statement
Will individual participant data (IPD) for this trial be available (including data dictionaries)?
No
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No/undecided IPD sharing reason/comment
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What supporting documents are/will be available?
No Supporting Document Provided
Results publications and other study-related documents
Documents added manually
No documents have been uploaded by study researchers.
Documents added automatically
No additional documents have been identified.
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