Tato stránka byla automaticky přeložena a přesnost překladu není zaručena. Podívejte se prosím na anglická verze pro zdrojový text.

A Phase IV Clinical Trial of Influenza Vaccine (Split Virion), Inactivatedin (Anflu®) Pregnant Women (AnFLU-PREG)

16. září 2026 aktualizováno: Sinovac Biotech Co., Ltd

A Phase IV, Randomized, Double-blind, Positive-controlled , Multicenter Clinical Trial to Evaluate the Immunogenicity and Safety of Influenza Vaccine (Split Virion) , Inactivated (Anflu®) in Pregnant Women

A phase IV clinical trial of Influenza Vaccine (Split Virion), Inactivated (Anflu®) developed by Sinovac Biotech Co., Ltd will be conducted in pregnant women.

A total of 150 healthy pregnant women aged 18~45 years at 22 to 34 weeks (+6 days) of pregnancy will be enrolled. All participants will be randomized to test group and control group in a ratio of 2:1 and receive one dose of vaccine (0.5 mL) of Sinovac Influenza Vaccine (Split Virion) , Inactivated (Anflu®) or Sanofi VAXIGRIP®, respectively.

Přehled studie

Postavení

Zatím nenabíráme

Podmínky

Intervence / Léčba

Detailní popis

A phase IV clinical trial of Influenza Vaccine (Split Virion), Inactivated (Anflu®) developed by Sinovac Biotech Co., Ltd will be conducted in Chinese pregnant women.

A total of 150 healthy pregnant women aged 18~45 years at 22 to 34 weeks (+6 days) of pregnancy will be enrolled.The trial is a randomized, double-blind, positive controlled study to evaluate the immunogenicity and safety of Influenza Vaccine (Split Virion) ,Inactivated (Anflu®) manufactured by Sinovac. The active control vaccine is VAXIGRIP® manufactured by Sanofi.

For immunogenicity assessment, blood samples will be collected from participants prior to vaccination, 28 days post-vaccination, and at the end of pregnancy (at delivery) to evaluate antibody levels in pregnant women following influenza vaccination. Additionally, the cord blood samples will be collected at delivery to assess transplacental antibody transfer to the fetus. Antibodies will be tested using the hemagglutination-inhibition (HI) assay.

For safety assessment, any immediate adverse events within 30 minutes after vaccine administration, solicited local and systemic adverse events within 7 days and unsolicited adverse events within 28 days will be collected. Serious adverse events will be collected from the time of informed consent signature until 3 months after delivery (or until 3 months after the event if pregnancy termination occurs). Pregnancy and neonatal outcomes will be collected by medical record review .

Typ studie

Intervenční

Zápis (Odhadovaný)

150

Fáze

  • Fáze 4

Kontakty a umístění

Tato část poskytuje kontaktní údaje pro ty, kteří studii provádějí, a informace o tom, kde se tato studie provádí.

Studijní kontakt

Studijní místa

  • Čína
      • Changsha, Čína
        • Hunan Provincial Maternal and Child Health Care Hospital
        • Kontakt:
          • Tang Yabing
      • Chengdu, Čína
        • Chengdu Women's and Children's Central Hospital
        • Kontakt:
          • Lai Fan
      • Chongqing, Čína
        • The First Affiliated Hospital of Chongqing Medical University
        • Kontakt:
          • Qi Hongbo
      • Guangzhou, Čína
        • Nanfang Hospital, Southern Medical University
        • Kontakt:
          • Huang Liping
      • Nanjing, Čína
        • Nanjing Drum Tower Hospita
        • Kontakt:
          • Li Jie
      • Wuhan, Čína
        • Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology
        • Kontakt:
          • Feng Ling

Kritéria účasti

Výzkumníci hledají lidi, kteří odpovídají určitému popisu, kterému se říká kritéria způsobilosti. Některé příklady těchto kritérií jsou celkový zdravotní stav osoby nebo předchozí léčba.

Kritéria způsobilosti

Věk způsobilý ke studiu

18 let až 45 let (Dospělý)

Přijímá zdravé dobrovolníky

Ano

Pohlaví způsobilá ke studiu

Ženský

Popis

Inclusion Criteria:

  1. Healthy pregnant women aged 18 to 45 years (inclusive) with stable health status, at 22 to 34 weeks (+6 days) of gestation. Gestational age is determined based on early ultrasound examination, or based on the last menstrual period if early ultrasound is unavailable.
  2. Participants are able to understand and sign the informed consent form voluntarily;
  3. Participants are willing and able to adhere to visit schedules and maintain accessible contact throughout the study period;
  4. Participants should provide verifiable identification;
  5. Have a singleton pregnancy;
  6. Have normal non-invasive prenatal DNA test and systematic ultrasound results during the current pregnancy; normal amniocentesis results are required if the test has been performed.

Exclusion Criteria:

  1. Have a history of two or more preterm deliveries (delivery before 37 weeks of gestation), previous infants with low birth weight (birth weight <2500 g), or a history of neonatal asphyxia or neonatal neurological damage;
  2. Have a history of multiple unexplained spontaneous abortions;
  3. Have received any influenza vaccine or the influenza vaccine for the current influenza season within 6 months prior to enrollment, or plan to receive influenza vaccination during the study period.
  4. Have suffered from seasonal influenza within 6 months prior to enrollment.
  5. Have a history of Guillain-Barré syndrome within 6 weeks after previous influenza vaccination.
  6. Have allergic reactions or other severe adverse reactions to any influenza vaccine or its components.
  7. Have severe autoimmune diseases or immunodeficiency diseases (including but not limited to active systemic lupus erythematosus, rheumatoid arthritis, asplenia, functional asplenia, and HIV infection) and are judged unsuitable for vaccination by the investigator.
  8. Abnormal coagulation function (such as coagulation factor deficiency, coagulation disorders or platelet abnormalities).
  9. Have severe chronic diseases (including but not limited to cardiovascular diseases, partial liver diseases, renal diseases or malignant tumors) that may interfere with the study as judged by the investigator.
  10. Have a current or previous history of severe neurological diseases (epilepsy, convulsions) or psychiatric disorders, or have a family history of psychiatric disorders.
  11. Received corticosteroids (adult prednisone ≥20 mg/day or equivalent) or other immunosuppressants for ≥14 days, or cytotoxic therapy within 6 months prior to vaccination, or plan to receive such therapy during the study period.
  12. Received immunoglobulins or other blood products within 3 months prior to vaccination, or plan to receive such products during the study period.
  13. Received any vaccine within 28 days prior to study vaccination, or plan to receive any vaccine within 28 days after study vaccination.
  14. Have enrolled in other clinical trials of investigational drugs or vaccines during the follow-up period, or plan to receive investigational drugs or vaccines during the study period.
  15. Have acute diseases or acute exacerbation of chronic diseases within 7 days before vaccination.
  16. Have fever on the scheduled vaccination day with an axillary temperature ≥37.3 °C before vaccination.
  17. Have clinically significant abnormal laboratory findings as judged by the investigator, or meet any of the following laboratory criteria: a) White blood cell count >15.0×10^9/L; b) Neutrophil percentage >85%; c) Alanine aminotransferase (ALT) or aspartate aminotransferase (AST) >2 times the upper limit of normal (2×ULN); d) Total bilirubin >2 times the upper limit of normal (2×ULN).
  18. Any other factors which are unsuitable for participation in the clinical trial as judged by the investigator.

Studijní plán

Tato část poskytuje podrobnosti o studijním plánu, včetně toho, jak je studie navržena a co studie měří.

Jak je studie koncipována?

Detaily designu

  • Primární účel: Prevence
  • Přidělení: Randomizované
  • Intervenční model: Paralelní přiřazení
  • Maskování: Čtyřnásobek

Zbraně a zásahy

Skupina účastníků / Arm
Intervence / Léčba
Experimentální: Test Group

100 participants will receive one dose of vaccine (0.5 mL) of Sinovac Influenza Vaccine (Split Virion) Inactivated (Anflu®) . Route of administration is intramuscular injection at deltoid muscle of upper arm.Immunization schedule is 1 dose
Biologický: Anflu®

Participants will receive one dose of Sinovac Anflu® .
Aktivní komparátor: Control Group

50 participants will receive one dose of vaccine (0.5 mL) of VAXIGRIP® manufactured by Sanofi. Route of administration is intramuscular injection at deltoid muscle of upper arm.Immunization schedule is 1 dose
Biologický: Vaxigrip®

Participants will receive one dose of Sanofi Vaxigrip®.

Co je měření studie?

Primární výstupní opatření

Měření výsledku
Popis opatření
Časové okno
The seroconversion rates (SCRs) of hemagglutination inhibition (HI) antibodies at day 28 ,as measured by HAI assay for vaccine-matched influenza A and B
Časové okno: 28 days after vaccination

Influenza A included H1N1 and H3N2 and influenza B strains included Victoria-lineage. Seroconversion is defined as either a baseline HI titer <1:10 and a post-vaccination titer ≥1:40 or a baseline HI titer ≥1:10 and a minimum 4-fold rise in post-vaccination HI antibody titer.
28 days after vaccination
Incidence of adverse reactions within 28 days after vaccination
Časové okno: 28 days after vaccination

Incidence of adverse reactions within 28 days after vaccination. Adverse reactions include solicited and unsolicited adverse reactions. Solicited local (injection site) symptoms: pain, swelling, erythema, induration, pruritus; Solicited systemic (non-injection site) symptoms: fever (axillary temperature), fatigue, myalgia, headache, hypersensitivity reaction.
28 days after vaccination

Sekundární výstupní opatření

Měření výsledku
Popis opatření
Časové okno
The seroprotection rates (SPRs) of HI antibodies at day 28 ,as measured by HAI assay for vaccine-matched influenza A and B
Časové okno: 28 days after vaccination

Influenza A included H1N1 and H3N2 and influenza B strains included Victoria-lineage. Seroprotection is defined as an HI titer ≥1: 40.
28 days after vaccination
The geometric mean titers (GMTs) of HI antibodies at day 28 ,as measured by HAI assay for vaccine-matched influenza A and B
Časové okno: 28 days after vaccination

Influenza A included H1N1 and H3N2 and influenza B strains included Victoria-lineage. Log-transformed post-vaccination HI antibody titer will be the dependent variable, with treatment group as fixed effect and log-transformed pre-vaccination HI antibody titer as covariate. Least-squares mean differences with two-sided 95% CIs will be estimated and back-transformed via exponentiation to derive adjusted GMT ratios (experimental vs control) and corresponding two-sided 95% CIs.
28 days after vaccination
The geometric mean fold rises (GMFRs) of HI antibodies at day 28 ,as measured by HAI assay for vaccine-matched influenza A and B
Časové okno: 28 days after vaccination

Influenza A included H1N1 and H3N2 and influenza B strains included Victoria-lineage. Geometric mean of antibody fold-rise with two-sided 95% CI will be calculated , along with the geometric mean ratio and its corresponding two-sided 95% CI.
28 days after vaccination
The SCRs of HI antibodies at delivery, as measured by HAI assay for vaccine-matched influenza A and B
Časové okno: At the date of delivery , estimated to be 6-18 weeks after randomization.

Influenza A included H1N1 and H3N2 and influenza B strains included Victoria-lineage. Seroconversion is defined as either a baseline HI titer <1:10 and a post-vaccination titer ≥1:40 or a baseline HI titer ≥1:10 and a minimum 4-fold rise in post-vaccination HI antibody titer.
At the date of delivery , estimated to be 6-18 weeks after randomization.
The SPRs of HI antibodies at delivery ,as measured by HAI assay for vaccine-matched influenza A and B
Časové okno: At the date of delivery , estimated to be 6-18 weeks after randomization.

Influenza A included H1N1 and H3N2 and influenza B strains included Victoria-lineage. Seroprotection is defined as an HI titer ≥1: 40.
At the date of delivery , estimated to be 6-18 weeks after randomization.
The GMTs of HI antibodies at delivery,as measured by HAI assay for vaccine-matched influenza A and B
Časové okno: At the date of delivery , estimated to be 6-18 weeks after randomization.

Influenza A included H1N1 and H3N2 and influenza B strains included Victoria-lineage. Log-transformed post-vaccination HI antibody titer will be the dependent variable, with treatment group as fixed effect and log-transformed pre-vaccination HI antibody titer as covariate. Least-squares mean differences with two-sided 95% CIs will be estimated and back-transformed via exponentiation to derive adjusted GMT ratios (experimental vs control) and corresponding two-sided 95% CIs.
At the date of delivery , estimated to be 6-18 weeks after randomization.
The GMFRs of HI antibodies at delivery,as measured by HAI assay for vaccine-matched influenza A and B
Časové okno: At the date of delivery , estimated to be 6-18 weeks after randomization.

Influenza A included H1N1 and H3N2 and influenza B strains included Victoria-lineage. Geometric mean of antibody fold-rise with two-sided 95% CI will be calculated , along with the geometric mean ratio and its corresponding two-sided 95% CI.
At the date of delivery , estimated to be 6-18 weeks after randomization.
The SPRs of HI antibodies in cord blood at delivery ,as measured by HAI assay for vaccine-matched influenza A and B
Časové okno: At the date of delivery, estimated to be 6-18 weeks after randomization

Influenza A included H1N1 and H3N2 and influenza B strains included Victoria-lineage. Seroprotection is defined as an HI titer ≥1: 40.
At the date of delivery, estimated to be 6-18 weeks after randomization
The GMTs of HI antibodies in cord blood at delivery, as measured by HAI assay for vaccine-matched influenza A and B
Časové okno: At the date of delivery, estimated to be 6-18 weeks after randomization

Influenza A included H1N1 and H3N2 and influenza B strains included Victoria-lineage. Log-transformed post-vaccination HI antibody titer will be the dependent variable, with treatment group as fixed effect and log-transformed pre-vaccination HI antibody titer as covariate. Least-squares mean differences with two-sided 95% CIs will be estimated and back-transformed via exponentiation to derive adjusted GMT ratios (experimental vs control) and corresponding two-sided 95% CIs.
At the date of delivery, estimated to be 6-18 weeks after randomization
Incidence of serious adverse events from vaccination through 3 months after delivery.
Časové okno: From vaccination to 3 months after delivery.

Serious adverse events within 3 months after delivery.
From vaccination to 3 months after delivery.
Pregnancy outcomes
Časové okno: At the date of delivery, estimated to be 6-18 weeks after randomization

Pregnancy outcomes: term birth, preterm birth, elective termination of pregnancy, fetal death, and gestational complications, etc.
At the date of delivery, estimated to be 6-18 weeks after randomization
Neonatal birth outcomes
Časové okno: 3 months after delivery

Birth outcomes: normal status, low birth weight, congenital malformations, neonatal NICU admission, and neonatal death, etc.
3 months after delivery

Spolupracovníci a vyšetřovatelé

Zde najdete lidi a organizace zapojené do této studie.

Sponzor

Sinovac Biotech Co., Ltd

Vyšetřovatelé

  • Vrchní vyšetřovatel: Qi Hongbo, First Affiliated Hospital of Chongqing Medical University

Termíny studijních záznamů

Tato data sledují průběh záznamů studie a předkládání souhrnných výsledků na ClinicalTrials.gov. Záznamy ze studií a hlášené výsledky jsou před zveřejněním na veřejné webové stránce přezkoumány Národní lékařskou knihovnou (NLM), aby se ujistily, že splňují specifické standardy kontroly kvality.

Hlavní termíny studia

Začátek studia (Odhadovaný)

1. října 2026

Primární dokončení (Odhadovaný)

1. února 2027

Dokončení studie (Odhadovaný)

1. dubna 2027

Termíny zápisu do studia

První předloženo

28. srpna 2026

První předloženo, které splnilo kritéria kontroly kvality

16. září 2026

První zveřejněno (Aktuální)

21. září 2026

Aktualizace studijních záznamů

Poslední zveřejněná aktualizace (Aktuální)

21. září 2026

Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality

16. září 2026

Naposledy ověřeno

1. srpna 2026

Více informací

Termíny související s touto studií

Klíčová slova

Další relevantní podmínky MeSH

Další identifikační čísla studie

  • PRO-INF-4015

Informace o lécích a zařízeních, studijní dokumenty

Studuje lékový produkt regulovaný americkým FDA

Ne

Studuje produkt zařízení regulovaný americkým úřadem FDA

Ne

Tyto informace byly beze změn načteny přímo z webu clinicaltrials.gov. Máte-li jakékoli požadavky na změnu, odstranění nebo aktualizaci podrobností studie, kontaktujte prosím register@clinicaltrials.gov. Jakmile bude změna implementována na clinicaltrials.gov, bude automaticky aktualizována i na našem webu .

Předplatit