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    Clinical Trial Results:
    Combined Prevention of Sexually Transmitted Infections (STIs) in Men Who Have Sex with Men using oral TDF/FTC for HIV Pre-Exposure Prophylaxis (PrEP)

    Summary
    EudraCT number
    2019-002829-29
    Trial protocol
    FR  
    Global end of trial date
    26 Sep 2024

    Results information
    Results version number
    v1(current)
    This version publication date
    09 Oct 2026
    First version publication date
    09 Oct 2026
    Other versions

    Trial information

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    Trial identification
    Sponsor protocol code
    ANRS 174 DOXYVAC
    Additional study identifiers
    ISRCTN number
    -
    US NCT number
    NCT04597424
    WHO universal trial number (UTN)
    -
    Sponsors
    Sponsor organisation name
    INSERM ANRS
    Sponsor organisation address
    2 Rue d'Oradour Sur Glane , PARIS, France, 75015
    Public contact
    Adèle WEGANG NZEUFO, INSERM ANRS, cdp.clinique@anrs.fr
    Scientific contact
    Jean Michel MOLINA, Service des Maladies Infectieuses - Hôpital Saint Louis, +33 142499066, jean-michel.molina@aphp.fr
    Paediatric regulatory details
    Is trial part of an agreed paediatric investigation plan (PIP)
    No
    Does article 45 of REGULATION (EC) No 1901/2006 apply to this trial?
    No
    Does article 46 of REGULATION (EC) No 1901/2006 apply to this trial?
    No
    Results analysis stage
    Analysis stage
    Final
    Date of interim/final analysis
    21 Apr 2023
    Is this the analysis of the primary completion data?
    No
    Global end of trial reached?
    Yes
    Global end of trial date
    26 Sep 2024
    Was the trial ended prematurely?
    Yes
    General information about the trial
    Main objective of the trial
    - To demonstrate that post-exposure prophylaxis (PEP) with doxycycline reduces the occurrence of a first episode of syphilis or Chlamydia trachomatis - To demonstrate that the meningococcal B vaccine (Bexsero®) reduces the occurrence of first episode of Neisseria Gonorrheae
    Protection of trial subjects
    This study was conducted in accordance with the updated Declaration of Helsinki, in compliance with the approved protocol and its amendments, the International Council for Harmonisation guideline for GoodClinical Practice (ICH GCP), and French regulatory requirements.
    Background therapy
    -
    Evidence for comparator
    -
    Actual start date of recruitment
    19 Jan 2021
    Long term follow-up planned
    No
    Independent data monitoring committee (IDMC) involvement?
    Yes
    Population of trial subjects
    Number of subjects enrolled per country
    Country: Number of subjects enrolled
    France: 545
    Worldwide total number of subjects
    545
    EEA total number of subjects
    545
    Number of subjects enrolled per age group
    In utero
    0
    Preterm newborn - gestational age < 37 wk
    0
    Newborns (0-27 days)
    0
    Infants and toddlers (28 days-23 months)
    0
    Children (2-11 years)
    0
    Adolescents (12-17 years)
    0
    Adults (18-64 years)
    536
    From 65 to 84 years
    9
    85 years and over
    0

    Subject disposition

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    Recruitment
    Recruitment details
    10 hospital sites in Paris recruited participants from January 19, 2021 to September 19, 2022. From the 556 participants randomised, only 545 were included in the analysis. 11 participants did not do the mandatory follow-up visit.

    Pre-assignment
    Screening details
    Includion criteria : MSM participating in the ANRS PREVENIR study, taking PrEP for at least 6 months (in the ANRS PREVENIR study or before participating in the ANRS PREVENIR study), no clinical signs of HIV infection and no symptoms of bacterial STI infection Non-inclusion criteria : HIV infection, history of vaccination with Bexsero

    Period 1
    Period 1 title
    Overall trial (overall period)
    Is this the baseline period?
    Yes
    Allocation method
    Randomised - controlled
    Blinding used
    Not blinded

    Arms
    Are arms mutually exclusive
    Yes

    Arm title
    Doxycyclin - Bexsero
    Arm description
    -
    Arm type
    Experimental

    Investigational medicinal product name
    Doxycyclin
    Investigational medicinal product code
    Other name
    Pharmaceutical forms
    Tablet
    Routes of administration
    Oral use
    Dosage and administration details
    Two 100 mg tablets of doxycycline should be taken orally after each instance of unprotected sex, ideally within 24 hours of sexual intercourse and no later than 72 hours afterward.

    Investigational medicinal product name
    Bexsero
    Investigational medicinal product code
    Other name
    Meningococcal Group B Vaccine
    Pharmaceutical forms
    Injection
    Routes of administration
    Intramuscular use
    Dosage and administration details
    Two doses of the Bexsero vaccine (at the first visit and two months later). The vaccine will be administered by deep intramuscular injection, preferably in the deltoid muscle of the upper arm.

    Arm title
    Doxycyclin - no Bexsero
    Arm description
    -
    Arm type
    Experimental

    Investigational medicinal product name
    Doxycyclin
    Investigational medicinal product code
    Other name
    Pharmaceutical forms
    Tablet
    Routes of administration
    Oral use
    Dosage and administration details
    Two 100 mg tablets of doxycycline should be taken orally after each instance of unprotected sex, ideally within 24 hours of sexual intercourse and no later than 72 hours afterward.

    Arm title
    No Doxycyclin - Bexsero
    Arm description
    -
    Arm type
    Experimental

    Investigational medicinal product name
    Bexsero
    Investigational medicinal product code
    Other name
    Meningococcal Group B Vaccine
    Pharmaceutical forms
    Injection
    Routes of administration
    Intramuscular use
    Dosage and administration details
    Two doses of the Bexsero vaccine (at the first visit and two months later). The vaccine will be administered by deep intramuscular injection, preferably in the deltoid muscle of the upper arm.

    Arm title
    No Doxycyclin - no Bexsero
    Arm description
    -
    Arm type
    No intervention

    Investigational medicinal product name
    No investigational medicinal product assigned in this arm
    Number of subjects in period 1
    Doxycyclin - Bexsero Doxycyclin - no Bexsero No Doxycyclin - Bexsero No Doxycyclin - no Bexsero
    Started
    182
    180
    93
    90
    Completed
    170
    157
    82
    81
    Not completed
    12
    23
    11
    9
         Adverse event, non-fatal
    -
    3
    -
    -
         Participant's decision
    3
    4
    1
    2
         In relationship
    3
    4
    1
    1
         Lost to follow-up
    3
    5
    5
    2
         Moved
    3
    7
    3
    4
         HIV +
    -
    -
    1
    -

    Baseline characteristics

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    Baseline characteristics reporting groups
    Reporting group title
    Doxycyclin - Bexsero
    Reporting group description
    -

    Reporting group title
    Doxycyclin - no Bexsero
    Reporting group description
    -

    Reporting group title
    No Doxycyclin - Bexsero
    Reporting group description
    -

    Reporting group title
    No Doxycyclin - no Bexsero
    Reporting group description
    -

    Reporting group values
    Doxycyclin - Bexsero Doxycyclin - no Bexsero No Doxycyclin - Bexsero No Doxycyclin - no Bexsero Total
    Number of subjects
    182 180 93 90 545
    Age categorical
    Units: Subjects
        Adults (18-64 years)
    180 176 92 88 536
        From 65-84 years
    2 4 1 2 9
        85 years and over
    0 0 0 0 0
    Age continuous
    Units: years
        median (inter-quartile range (Q1-Q3))
    40 (33 to 47) 41 (35 to 50) 41 (35 to 48) 38 (33 to 47) -
    Gender categorical
    Units: Subjects
        Female
    0 0 0 0 0
        Male
    182 180 93 90 545

    End points

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    End points reporting groups
    Reporting group title
    Doxycyclin - Bexsero
    Reporting group description
    -

    Reporting group title
    Doxycyclin - no Bexsero
    Reporting group description
    -

    Reporting group title
    No Doxycyclin - Bexsero
    Reporting group description
    -

    Reporting group title
    No Doxycyclin - no Bexsero
    Reporting group description
    -

    Subject analysis set title
    Doxycyclin
    Subject analysis set type
    Full analysis
    Subject analysis set description
    Arm Doxycyclin-Bexsero (182) + Arm Doxycyclin (180)

    Subject analysis set title
    No Doxycyclin
    Subject analysis set type
    Full analysis
    Subject analysis set description
    Arm Bexsero (93) + Arm No Doxycyclin-No Bexsero (90)

    Subject analysis set title
    Bexsero
    Subject analysis set type
    Full analysis
    Subject analysis set description
    Arm Doxycyclin-Bexsero (182) + Arm Bexsero (93). 1 participant withdrew from the study.

    Subject analysis set title
    No Bexsero
    Subject analysis set type
    Full analysis
    Subject analysis set description
    Arm Doxycyclin (180) + Arm No Doxycyclin-No Bexsero (90)

    Primary: First episode of CT and/or SY after the inclusion visit

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    End point title
    First episode of CT and/or SY after the inclusion visit
    End point description
    The primary endpoint for intervention 1 (with or without doxycycline PEP) is the first episode of chlamydia or syphilis after the enrolment visit (D0) (chlamydia and syphilis diagnosed at the enrolment visit will not be included in the primary endpoint).
    End point type
    Primary
    End point timeframe
    January 19, 2021, to February 28, 2023.
    End point values
    Doxycyclin No Doxycyclin
    Number of subjects analysed
    362
    183
    Units: Number of events
    35
    80
    Statistical analysis title
    Incidence of first episode of CT and/or SY
    Statistical analysis description
    Incidence of first episode of CT and/or SY after the inclusion visit
    Comparison groups
    Doxycyclin v No Doxycyclin
    Number of subjects included in analysis
    545
    Analysis specification
    Pre-specified
    Analysis type
    superiority
    P-value
    < 0.05
    Method
    Regression, Cox
    Parameter type
    Hazard Ratio Adjusted
    Point estimate
    0.17
    Confidence interval
         level
    95%
         sides
    2-sided
         lower limit
    0.12
         upper limit
    0.26
    Variability estimate
    Standard deviation
    Dispersion value
    0.2

    Primary: First episode of NG after the M3 visit

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    End point title
    First episode of NG after the M3 visit
    End point description
    The primary endpoint for intervention 2 (with or without Bexsero® vaccine) is the first episode of gonorrhea reported one month after the second vaccine injection, so starting at the month 3 visit (gonorrhea episodes diagnosed at the enrolment visit and before the month 3 visit will not be included in the primary endpoint).
    End point type
    Primary
    End point timeframe
    From January 19, 2021 to February 28, 2023 for participants who completed the M3 visit.
    End point values
    Bexsero No Bexsero
    Number of subjects analysed
    274
    270
    Units: Number of events
    103
    122
    Statistical analysis title
    Incidence of first episode of GC after 3 months
    Comparison groups
    Bexsero v No Bexsero
    Number of subjects included in analysis
    544
    Analysis specification
    Pre-specified
    Analysis type
    superiority
    P-value
    < 0.05
    Method
    Regression, Cox
    Parameter type
    Hazard Ratio Adjusted
    Point estimate
    0.78
    Confidence interval
         level
    95%
         sides
    2-sided
         lower limit
    0.6
         upper limit
    1.01
    Variability estimate
    Standard deviation
    Dispersion value
    0.13

    Adverse events

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    Adverse events information
    Timeframe for reporting adverse events
    Participants reported adverse events during the entire trial.
    Assessment type
    Systematic
    Dictionary used for adverse event reporting
    Dictionary name
    MedDRA
    Dictionary version
    26.0
    Reporting groups
    Reporting group title
    Doxycyclin - Bexsero
    Reporting group description
    -

    Reporting group title
    Doxycyclin - no Bexsero
    Reporting group description
    -

    Reporting group title
    No Doxycyclin - Bexsero
    Reporting group description
    -

    Reporting group title
    No Doxycyclin - no Bexsero
    Reporting group description
    -

    Serious adverse events
    Doxycyclin - Bexsero Doxycyclin - no Bexsero No Doxycyclin - Bexsero No Doxycyclin - no Bexsero
    Total subjects affected by serious adverse events
         subjects affected / exposed
    40 / 182 (21.98%)
    31 / 180 (17.22%)
    17 / 93 (18.28%)
    13 / 90 (14.44%)
         number of deaths (all causes)
    0
    0
    0
    0
         number of deaths resulting from adverse events
    0
    0
    0
    0
    Injury, poisoning and procedural complications
    Femur fracture
         subjects affected / exposed
    1 / 182 (0.55%)
    0 / 180 (0.00%)
    0 / 93 (0.00%)
    0 / 90 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
    0 / 0
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    0 / 0
    Cardiac disorders
    Pericardial effusion
         subjects affected / exposed
    1 / 182 (0.55%)
    0 / 180 (0.00%)
    0 / 93 (0.00%)
    0 / 90 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
    0 / 0
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    0 / 0
    Hepatobiliary disorders
    Hepatic cytolysis
         subjects affected / exposed
    1 / 182 (0.55%)
    0 / 180 (0.00%)
    0 / 93 (0.00%)
    0 / 90 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
    0 / 0
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    0 / 0
    Skin and subcutaneous tissue disorders
    Angioedema
         subjects affected / exposed
    0 / 182 (0.00%)
    0 / 180 (0.00%)
    0 / 93 (0.00%)
    1 / 90 (1.11%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    0 / 0
    Fixed eruption
         subjects affected / exposed
    0 / 182 (0.00%)
    1 / 180 (0.56%)
    0 / 93 (0.00%)
    0 / 90 (0.00%)
         occurrences causally related to treatment / all
    0 / 0
    1 / 1
    0 / 0
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    0 / 0
    Rash maculo-papular
         subjects affected / exposed
    1 / 182 (0.55%)
    0 / 180 (0.00%)
    0 / 93 (0.00%)
    0 / 90 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
    0 / 0
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    0 / 0
    Psychiatric disorders
    Dependence
         subjects affected / exposed
    0 / 182 (0.00%)
    0 / 180 (0.00%)
    0 / 93 (0.00%)
    1 / 90 (1.11%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    0 / 0
    Depression
         subjects affected / exposed
    1 / 182 (0.55%)
    0 / 180 (0.00%)
    0 / 93 (0.00%)
    0 / 90 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
    0 / 0
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    0 / 0
    Drug dependence
         subjects affected / exposed
    1 / 182 (0.55%)
    0 / 180 (0.00%)
    1 / 93 (1.08%)
    0 / 90 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
    0 / 2
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    0 / 0
    Suicide attempt
         subjects affected / exposed
    0 / 182 (0.00%)
    1 / 180 (0.56%)
    0 / 93 (0.00%)
    0 / 90 (0.00%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
    0 / 0
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    0 / 0
    Infections and infestations
    Acute hepatitis C
         subjects affected / exposed
    1 / 182 (0.55%)
    0 / 180 (0.00%)
    0 / 93 (0.00%)
    0 / 90 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
    0 / 0
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    0 / 0
    Arthritis bacterial
         subjects affected / exposed
    0 / 182 (0.00%)
    1 / 180 (0.56%)
    0 / 93 (0.00%)
    0 / 90 (0.00%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 1
    0 / 0
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    0 / 0
    Gastroenteritis
         subjects affected / exposed
    1 / 182 (0.55%)
    0 / 180 (0.00%)
    0 / 93 (0.00%)
    0 / 90 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 0
    0 / 0
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    0 / 0
    Hepatitis C
         subjects affected / exposed
    1 / 182 (0.55%)
    1 / 180 (0.56%)
    1 / 93 (1.08%)
    0 / 90 (0.00%)
         occurrences causally related to treatment / all
    0 / 1
    0 / 1
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    0 / 0
    HIV infection
         subjects affected / exposed
    0 / 182 (0.00%)
    0 / 180 (0.00%)
    1 / 93 (1.08%)
    0 / 90 (0.00%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 0
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    0 / 0
    Monkeypox
         subjects affected / exposed
    32 / 182 (17.58%)
    27 / 180 (15.00%)
    13 / 93 (13.98%)
    12 / 90 (13.33%)
         occurrences causally related to treatment / all
    0 / 33
    0 / 27
    0 / 13
    0 / 12
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    0 / 0
    Streptococcal endocarditis
         subjects affected / exposed
    0 / 182 (0.00%)
    0 / 180 (0.00%)
    1 / 93 (1.08%)
    0 / 90 (0.00%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 0
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    0 / 0
    Superinfection
         subjects affected / exposed
    0 / 182 (0.00%)
    0 / 180 (0.00%)
    0 / 93 (0.00%)
    1 / 90 (1.11%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    0 / 1
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    0 / 0
    Urinary tract infection
         subjects affected / exposed
    0 / 182 (0.00%)
    0 / 180 (0.00%)
    1 / 93 (1.08%)
    0 / 90 (0.00%)
         occurrences causally related to treatment / all
    0 / 0
    0 / 0
    0 / 1
    0 / 0
         deaths causally related to treatment / all
    0 / 0
    0 / 0
    0 / 0
    0 / 0
    Frequency threshold for reporting non-serious adverse events: 5%
    Non-serious adverse events
    Doxycyclin - Bexsero Doxycyclin - no Bexsero No Doxycyclin - Bexsero No Doxycyclin - no Bexsero
    Total subjects affected by non serious adverse events
         subjects affected / exposed
    160 / 182 (87.91%)
    143 / 180 (79.44%)
    82 / 93 (88.17%)
    73 / 90 (81.11%)
    Nervous system disorders
    Headache
         subjects affected / exposed
    10 / 182 (5.49%)
    6 / 180 (3.33%)
    6 / 93 (6.45%)
    1 / 90 (1.11%)
         occurrences all number
    13
    7
    8
    1
    General disorders and administration site conditions
    Asthenia
         subjects affected / exposed
    17 / 182 (9.34%)
    20 / 180 (11.11%)
    10 / 93 (10.75%)
    3 / 90 (3.33%)
         occurrences all number
    22
    21
    10
    3
    Induration
         subjects affected / exposed
    10 / 182 (5.49%)
    1 / 180 (0.56%)
    5 / 93 (5.38%)
    3 / 90 (3.33%)
         occurrences all number
    11
    1
    5
    3
    Influenza like illness
         subjects affected / exposed
    6 / 182 (3.30%)
    7 / 180 (3.89%)
    3 / 93 (3.23%)
    5 / 90 (5.56%)
         occurrences all number
    6
    9
    3
    5
    Injection site erythema
         subjects affected / exposed
    3 / 182 (1.65%)
    1 / 180 (0.56%)
    4 / 93 (4.30%)
    0 / 90 (0.00%)
         occurrences all number
    3
    1
    4
    0
    Injection site pain
         subjects affected / exposed
    65 / 182 (35.71%)
    37 / 180 (20.56%)
    36 / 93 (38.71%)
    16 / 90 (17.78%)
         occurrences all number
    83
    44
    43
    16
    Nodule
         subjects affected / exposed
    4 / 182 (2.20%)
    1 / 180 (0.56%)
    6 / 93 (6.45%)
    1 / 90 (1.11%)
         occurrences all number
    5
    1
    6
    1
    Oedema
         subjects affected / exposed
    6 / 182 (3.30%)
    3 / 180 (1.67%)
    5 / 93 (5.38%)
    2 / 90 (2.22%)
         occurrences all number
    6
    3
    5
    2
    Pain
         subjects affected / exposed
    28 / 182 (15.38%)
    11 / 180 (6.11%)
    12 / 93 (12.90%)
    9 / 90 (10.00%)
         occurrences all number
    35
    12
    16
    12
    Pyrexia
         subjects affected / exposed
    7 / 182 (3.85%)
    13 / 180 (7.22%)
    4 / 93 (4.30%)
    4 / 90 (4.44%)
         occurrences all number
    7
    15
    4
    4
    Gastrointestinal disorders
    Abdominal pain
         subjects affected / exposed
    4 / 182 (2.20%)
    9 / 180 (5.00%)
    3 / 93 (3.23%)
    3 / 90 (3.33%)
         occurrences all number
    4
    10
    3
    3
    Diarrhoea
         subjects affected / exposed
    10 / 182 (5.49%)
    9 / 180 (5.00%)
    5 / 93 (5.38%)
    2 / 90 (2.22%)
         occurrences all number
    10
    10
    5
    2
    Reproductive system and breast disorders
    Erectile dysfunction
         subjects affected / exposed
    2 / 182 (1.10%)
    7 / 180 (3.89%)
    1 / 93 (1.08%)
    4 / 90 (4.44%)
         occurrences all number
    2
    11
    1
    4
    Respiratory, thoracic and mediastinal disorders
    Cough
         subjects affected / exposed
    1 / 182 (0.55%)
    4 / 180 (2.22%)
    4 / 93 (4.30%)
    2 / 90 (2.22%)
         occurrences all number
    1
    4
    4
    2
    Skin and subcutaneous tissue disorders
    Erythema
         subjects affected / exposed
    11 / 182 (6.04%)
    4 / 180 (2.22%)
    4 / 93 (4.30%)
    2 / 90 (2.22%)
         occurrences all number
    16
    4
    4
    2
    Psychiatric disorders
    Depression
         subjects affected / exposed
    7 / 182 (3.85%)
    4 / 180 (2.22%)
    2 / 93 (2.15%)
    5 / 90 (5.56%)
         occurrences all number
    7
    5
    2
    5
    Musculoskeletal and connective tissue disorders
    Arthralgia
         subjects affected / exposed
    1 / 182 (0.55%)
    9 / 180 (5.00%)
    2 / 93 (2.15%)
    0 / 90 (0.00%)
         occurrences all number
    1
    10
    2
    0
    Myalgia
         subjects affected / exposed
    10 / 182 (5.49%)
    9 / 180 (5.00%)
    1 / 93 (1.08%)
    1 / 90 (1.11%)
         occurrences all number
    11
    10
    1
    1
    Pain in extremity
         subjects affected / exposed
    10 / 182 (5.49%)
    5 / 180 (2.78%)
    7 / 93 (7.53%)
    4 / 90 (4.44%)
         occurrences all number
    12
    5
    9
    5
    Infections and infestations
    Coronavirus infection
         subjects affected / exposed
    32 / 182 (17.58%)
    34 / 180 (18.89%)
    19 / 93 (20.43%)
    16 / 90 (17.78%)
         occurrences all number
    36
    37
    21
    16
    Monkeypox
         subjects affected / exposed
    22 / 182 (12.09%)
    20 / 180 (11.11%)
    7 / 93 (7.53%)
    8 / 90 (8.89%)
         occurrences all number
    22
    20
    7
    8
    Tonsillitis
         subjects affected / exposed
    3 / 182 (1.65%)
    3 / 180 (1.67%)
    5 / 93 (5.38%)
    4 / 90 (4.44%)
         occurrences all number
    3
    3
    6
    4

    More information

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    Substantial protocol amendments (globally)

    Were there any global substantial amendments to the protocol? Yes
    Date
    Amendment
    17 Sep 2020
    The substantial modifications included in the amendment 1 of the protocol are : • Change to the study title. • Change of investigator at one site; resume submitted. • Update to the list of investigational sites • Addition of a secondary objective. • Change to the composition of the CSI: withdrawal of one member from the association (TRT-5), addition of a second STI specialist clinician. • Amendment to the research schedule due to the COVID-19 pandemic (postponed by two quarters). • Amendment regarding the packaging of Doxycycline; information documents amended accordingly. • Addition of the code ‘DV’ to the participant’s code.
    14 Dec 2020
    The substantial modifications included in the amendment 2 of the protocol are : • Addition of a representative of people living with HIV and a microbiologist to the oversight committee. • Research schedule postponed by one quarter due to the COVID-19 pandemic. Insurance certificate updated. • New centralization of samples collected in cases of ulceration: Cochin Hospital. • Modification of capillary blood collection procedures.
    23 Nov 2021
    The substantial modifications included in the amendment 3 of the protocol are : • Extension of the enrollment period by 12 months. Extended coverage. • Update of the protocol following the creation of the ANRS-Emerging Infectious Diseases Agency (ANRS | MIE). • Removal of center no. 61. • Addition of a sample collected in UTM (Universal Transport Medium) if the patient returns with a positive PCR for Chlamydia when picking up their treatment. • Addition of a “test-of-cure” sample collection 4 weeks into treatment in cases of positive STIs. This is part of standard care for Neisseria gonorrhoeae-positive STIs. If this second PCR is positive, a new sample must be collected at the site to isolate the Chlamydia strain and test for potential resistance to treatment for Neisseria and Mycoplasma. • Updates to the information letter (procedure for STIs). • Creation of a newsletter for participants.
    12 May 2022
    The substantial modifications included in the amendment 4 of the protocol are : - Added 4 new centers: Lariboisière, Garches, A Béclère, F Widal - Updated the Bexsero protocol - Changes related to the sponsor: ANRS | MIE has moved to 2 Rue d’Oradour-sur-Glane, 75015 Paris and has a new logo.
    25 Jul 2022
    The substantial modifications included in the amendment 5 of the protocol concerns the collection of data on “monkeypox” status among participants in the ANRS 174 DOXYVAC study. - date of vaccination, - possible occurrence of a Monkeypox (MKPV) infection, - symptoms suggestive of MKPV since the last visit, - date of any childhood vaccinations, - indication of pre- or post-exposure vaccination, - indication of contact with a person diagnosed as positive.
    17 Oct 2022
    The substantial modifications included in the amendment 6 of the protocol are : - Halting enrollment in the efficacy trial; - Offering all enrolled participants both interventions: post-exposure doxycycline and vaccination with Bexsero
    12 May 2023
    The substantial modification included in the amendment 7 of the protocol is : Drafting a newsletter for participants to provide them with updated information on the results of the ANRS 174 DOXYVAC trial.
    24 Feb 2024
    The substantial modification included in the amendment 8 of the protocol is : Newsletter No. 4 to participants regarding the release of the final results of the ANRS 174 DOXYVAC trial.

    Interruptions (globally)

    Were there any global interruptions to the trial? No

    Limitations and caveats

    Limitations of the trial such as small numbers of subjects analysed or technical problems leading to unreliable data.
    None reported

    Online references

    http://www.ncbi.nlm.nih.gov/pubmed/38797183
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