A Phase 2 interventional study of Inactivated H1N1 Vaccine in Influenza, sponsored by National Institute of Allergy and Infectious Diseases (NIAID). Completed at 6 sites in United States. Open to female participants aged 18 Years to 39 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2013-08-07.
Sponsored by National Institute of Allergy and Infectious Diseases (NIAID) · Phase 2, Interventional, and Prevention
The purpose of this study is to evaluate the safety of a 2009 H1N1 influenza vaccine in pregnant women and to determine how their body reacts to different strengths of the vaccine. Two strengths of the H1N1 influenza vaccine will be tested. Since it is not known if the response to the vaccine in pregnant women is the same or different than in non-pregnant women, the study also includes a group of women who are not pregnant for comparison. Participants include 200 pregnant women and 100 non-pregnant women ages 18-39. Study procedures include physical exams, several blood samples and maintaining a memory aid to document daily temperature and side effects for 8 days following vaccination. Participants will be involved in study related procedures for about 6 months.
Recently, a novel swine-origin influenza A/H1N1 virus was identified as a significant cause of febrile respiratory illnesses in Mexico and the United States. It rapidly spread to many countries around the world, prompting the World Health Organization to declare a pandemic on June 11, 2009. Pregnant women are at an increased risk for serious consequences of influenza infection. A 15 microgram (mcg) dose of unadjuvanted inactivated H1N1 vaccine is recommended for healthy adults and recent preliminary data indicates this dose is likely to be protective for pregnant women. However, a higher dose of an unadjuvanted, inactivated influenza H1N1 vaccine may be necessary to confer optimal protection to this at risk population. This protocol will explore the antibody response following vaccination of pregnant women at 2 different dose levels (15 mcg and 30 mcg) and a non-pregnant control group receiving a 15 mcg dose. Antibody responses will be assessed at 21 days and 180 days post vaccination. For pregnant women, maternal and cord blood will be collected to determine the level of H1N1 antibodies transferred to the baby. An optimal immune response in pregnant women would impact transplacental transport of protective antibodies which is important since vaccines are not available for infants younger than six months, another at risk population for severe H1N1 disease. Sustained immunity for at least 6 months post-vaccination would impart benefit not only to the woman herself but also decrease a primary exposure risk (infected mother) for the newborn infant. Furthermore, a systematic evaluation of the kinetics of maternally transferred antibodies to 2009 H1N1 influenza virus will help improve and develop strategies to protect infants from influenza. This is an open label, Phase II study in pregnant and non-pregnant women, aged 18-39 years old designed to investigate the safety, reactogenicity, and immunogenicity of an inactivated influenza H1N1 virus vaccine. Pregnant women will be randomized into 2 groups (100 per dose group) to receive intramuscular (IM) inactivated influenza H1N1 vaccine at 15 mcg (Group 1) or 30 mcg (Group 2). A non-pregnant control group of 100 subjects will receive IM inactivated influenza H1N1 vaccine at 15 mcg (Group 3). Following immunization, safety will be measured by assessment of adverse events (AEs) through 21 days post vaccination (serious AEs and new-onset chronic medical conditions monthly through 6 months post vaccination (Day 180). Reactogenicity to the vaccine will be assessed for 8 days following vaccination (Day 0-7). Immunogenicity testing will include hemagglutination inhibition assay (HAI) and neutralizing antibody testing on serum obtained on Days 0, 21, and 180. For the pregnant groups, HAI antibody testing will also be performed on serum from the participant at delivery, on serum from cord blood collected at delivery and, when possible, on serum samples collected from the participant at day 180 and from the infant at 6 weeks, four months, or six months after delivery. The primary safety objective is to assess the safety of unadjuvanted, inactivated H1N1 influenza vaccine in pregnant women when administered at the 15 mcg or 30 mcg dose. The primary immunogenicity objective is to assess the antibody response to unadjuvanted, inactivated H1N1 influenza vaccine in pregnant women when administered at the 15 mcg or 30 mcg dose. The secondary objective for pregnant women is to assess the efficiency of placental transport of maternal influenza antigen specific antibodies to the neonate.
2,214 studies on the registry are indexed under Influenza, Human; 163 are open to participants now.
This study's enrollment of 84 is below the median of 238 across 1,853 interventional studies indexed under Influenza, Human.
Browse Influenza, Human studies →National Institute of Allergy and Infectious Diseases (NIAID) is the lead sponsor of 2,401 studies on the registry; 179 are open to participants now.
Of its 396 completed or terminated interventional studies of FDA-regulated products, 294 (74%) have results posted.
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Pregnant women:
Non-pregnant women:
Exclusion Criteria:
Pregnant women:
Non-pregnant women:
100 non-pregnant women to receive 15 mcg inactivated H1N1 vaccine.
Biological: Inactivated H1N1 Vaccine
100 pregnant women to receive 30 mcg inactivated H1N1 vaccine.
Biological: Inactivated H1N1 Vaccine
100 pregnant women to receive 15 mcg inactivated H1N1 vaccine.
Biological: Inactivated H1N1 Vaccine
H1N1 vaccine \[Influenza A (H1N1) 2009 Monovalent Vaccine\] is a licensed, inactivated influenza virus vaccine. It will be provided as prefilled single dose syringes containing 0.5 mL. The 0.5 mL prefilled syringe is formulated without preservative. The 15 microgram (mcg) dose will be administered as a single 0.5 mL intramuscular (IM) injection in the deltoid muscle of the preferred arm. The 30 mcg dose will be administered as two 0.5 mL injections in the deltoid muscle of each arm.
Number of Participants Reporting Maternal Complications of Pregnancy, Labor and Delivery
Participants were contacted after delivery, and medical records reviewed, to collect complications experienced during pregnancy, labor and delivery. The data collection process followed a prospectively-defined list of complications reported for this outcome measure, some of which may have also been reported as serious adverse events if otherwise meeting those requirements.
Time frame: At time of delivery
Number of Births With Neonatal Complications
Participants were contacted after delivery, and medical records reviewed, to collect neonatal complications. The data collection process followed a prospectively-defined list of complications reported for this outcome measure, some of which may have also been reported as serious adverse events if otherwise meeting those requirements.
Time frame: At time of delivery
Number of Participants Reporting Vaccine-associated Serious Adverse Events (SAEs)
Serious adverse events included any untoward medical occurrence that resulted in death of the mother, fetus or infant; was life threatening to mother, fetus or infant; was a persistent/significant disability/incapacity; required in-patient hospitalization or prolongation thereof; was a congenital anomaly/birth defect in fetus or infant; or may have jeopardized the mother, fetus or infant, or required intervention to prevent one of the outcomes, or was described as Guillain-Barré Syndrome. Association was determined by a clinician licensed to diagnose and listed on the site's FDA Form 1572.
Time frame: Day 0 through Day 180 after vaccination
Number of Participants Reporting Solicited Subjective Local Reactions After Vaccination
Participants maintained a memory aid to record daily the occurrence of local reactions of pain, tenderness and swelling for 8 days after vaccination (Day 0-7) based on their interference with daily activities. Participants are counted if they were reported as experiencing the symptom at any severity on any of the 8 days.
Time frame: Within 8 days post vaccination (Day 0-7)
Number of Participants Reporting Solicited Quantitative Local Reactions After Vaccination
Participants maintained a memory aid to record daily the occurrence of local reactions of redness and swelling for 8 days after vaccination (Day 0-7). If the reaction was present, the maximum diameter was measured in millimeters (mm). Participants are counted if they reported experiencing the reaction with any measurement greater than 0 mm on any of the 8 days.
Time frame: Within 8 days post vaccination (Day 0-7)
Number of Participants Reporting Solicited Subjective Systemic Reactions After Vaccination
Participants maintained a memory aid to record daily the occurrence of systemic symptoms of feverishness, malaise, myalgia, headache, and nausea for 8 days after vaccination (Day 0-7) based on their interference with daily activities. Participants are counted if they reported experiencing the symptom at any severity on any of the 8 days.
Time frame: Within 8 days post vaccination (Day 0-7)
Number of Participants Reporting Fever After Vaccination
Participants were provided with a thermometer and a memory aid on which to record daily oral temperatures for 8 days after vaccination (Day 0-7). The protocol defined fever as oral temperature of 37.8 degrees Celsius or higher. Participants are counted as experiencing fever if they reported oral temperatures of 37.8 degrees Celsius or higher on any of the 8 days.
Time frame: Within 8 days (Day 0-7) post vaccination
Number of Participants With 4-fold or Greater Serum Hemagglutination Inhibition (HAI) Antibody Titer Increases Against Influenza H1N1 2009 Virus Following a Single Dose of H1N1 Vaccine
Blood was collected from all participants prior to vaccination as well as 21 days after vaccination for testing in the HAI assay with Influenza H1N1 2009 virus as the assay antigen. A participant met the threshold of a 4-fold rise in titer if the Day 0 titer was less than 1:10 (the assay's lowest level of detection) and the Day 21 post vaccination titer was 1:40 or greater, or the Day 0 titer was greater than or equal to 1:10 and the Day 21 post vaccination titer was an increase by 4-fold or more.
Time frame: Day 0 prior to and Day 21 after the first vaccination
Number of Participants With a Serum Hemagglutination Inhibition (HAI) Antibody Titer of 1:40 or Greater Against Influenza H1N1 2009 Virus Following a Single Dose of H1N1 Vaccine
Blood was collected from all participants prior to and at Day 21 post vaccination for testing in the HAI assay with Influenza H1N1 2009 virus as the assay antigen. Each sample was tested at least twice according to standard operating procedures and the result of each replicate reported. A participant is counted if the geometric mean of the replicate values was 1:40 or greater.
Time frame: Day 0 prior to and Day 21 following vaccination
Number of Participants With a Serum Hemagglutination Inhibition Assay (HAI) Antibody Titer Greater Than or Equal to 40 Against the Novel Influenza H1N1 2009 Virus in the Maternal Blood at the Time of Delivery
Blood was collected from participants at the time of delivery for testing in the HAI assay with Influenza H1N1 2009 virus as the assay antigen. Each sample was tested at least twice according to standard operating procedures and the result of each replicate reported. A participant is counted if the geometric mean of the replicate values was 1:40 or greater.
Time frame: At time of delivery
Number of Participants With a Serum Hemagglutination Inhibition Assay (HAI) Antibody Titer Greater Than or Equal to 40 Against the Novel Influenza H1N1 2009 Virus in Cord Blood
Cord blood was collected at the time of delivery for testing in the HAI assay with Influenza H1N1 2009 virus as the assay antigen. Each sample was tested at least twice according to standard operating procedures and the result of each replicate reported. A participant is counted if the geometric mean of the replicate values was 1:40 or greater.
Time frame: At time of delivery
Participants were healthy pregnant and non-pregnant women recruited from existing volunteer populations and from the communities at large around the clinical sites. Participants were enrolled between 09Nov2009 and 04May2010.
| Milestone | Group 1: Pregnant Women: 15 Mcg H1N1 Vaccine | Group 2: Pregnant Women: 30 Mcg H1N1 Vaccine | Group 3: Non-pregnant Women: 15 Mcg H1N1 Vaccine |
|---|---|---|---|
| Started | 28 | 28 | 28 |
| Completed | 27 | 27 | 28 |
| Not completed | 1 | 1 | 0 |
Participants were contacted after delivery, and medical records reviewed, to collect complications experienced during pregnancy, labor and delivery. The data collection process followed a prospectively-defined list of complications reported for this outcome measure, some of which may have also been reported as serious adverse events if otherwise meeting those requirements.
| participants | Group 1: Pregnant Women: 15 Mcg H1N1 Vaccine | Group 2: Pregnant Women: 30 Mcg H1N1 Vaccine |
|---|---|---|
| Stillborn | 0 | 0 |
| Miscarriage | 0 | 0 |
| Gestational diabetes | 1 | 2 |
| Polyhydramnios | 1 | 0 |
| Oligohydramnios | 1 | 1 |
| Pregnancy induced hypertension | 0 | 3 |
| Pre-eclampsia | 1 | 3 |
| Eclampsia | 0 | 0 |
| Fetal Distress | 2 | 1 |
| Abruptio Placenta | 0 | 1 |
| Chorioamnionitis | 0 | 0 |
| Fever | 2 | 1 |
| Anaphylaxis | 0 | 0 |
| Antibiotics prior to delivery | 12 | 12 |
| Fetal abnormalities detected during pregnancy | 1 | 0 |
| Assisted vaginal delivery | 1 | 1 |
| Non-elective Cesarean section | 6 | 3 |
| Abnormal amniotic fluid | 5 | 5 |
| Postpartum fever | 0 | 0 |
| Postpartum endometritis | 0 | 0 |
| Postpartum bleeding | 2 | 0 |
| Postpartum bacteremia | 0 | 0 |
Participants were contacted after delivery, and medical records reviewed, to collect neonatal complications. The data collection process followed a prospectively-defined list of complications reported for this outcome measure, some of which may have also been reported as serious adverse events if otherwise meeting those requirements.
| births | Group 1: Pregnant Women: 15 Mcg H1N1 Vaccine | Group 2: Pregnant Women: 30 Mcg H1N1 Vaccine |
|---|---|---|
| Pre-term (less than 37 weeks) | 5 | 9 |
| Large for gestational age | 6 | 2 |
| Small for gestational age | 0 | 3 |
| Abnormal infant exam | 1 | 4 |
| Congenital abnormalities | 0 | 1 |
| Hematological complications | 1 | 1 |
| Infections | 0 | 0 |
| Sepsis | 0 | 0 |
| Meningitis | 0 | 0 |
| Metabolic complications | 1 | 1 |
| Respiratory complications | 5 | 4 |
| Respiratory support used | 5 | 4 |
| Fever 100.4 degrees Fahrenheit or greater | 0 | 0 |
| Admission to special nursery/infant intensive care | 5 | 8 |
Serious adverse events included any untoward medical occurrence that resulted in death of the mother, fetus or infant; was life threatening to mother, fetus or infant; was a persistent/significant disability/incapacity; required in-patient hospitalization or prolongation thereof; was a congenital anomaly/birth defect in fetus or infant; or may have jeopardized the mother, fetus or infant, or required intervention to prevent one of the outcomes, or was described as Guillain-Barré Syndrome. Association was determined by a clinician licensed to diagnose and listed on the site's FDA Form 1572.
| participants | Group 1: Pregnant Women: 15 Mcg H1N1 Vaccine | Group 2: Pregnant Women: 30 Mcg H1N1 Vaccine | Group 3: Non-pregnant Women: 15 Mcg H1N1 Vaccine |
|---|---|---|---|
| Number of Participants Reporting Vaccine-associated Serious Adverse Events (SAEs) | 0 | 0 | 0 |
Participants maintained a memory aid to record daily the occurrence of local reactions of pain, tenderness and swelling for 8 days after vaccination (Day 0-7) based on their interference with daily activities. Participants are counted if they were reported as experiencing the symptom at any severity on any of the 8 days.
| participants | Group 1: Pregnant Women: 15 Mcg H1N1 Vaccine | Group 2: Pregnant Women: 30 Mcg H1N1 Vaccine | Group 3: Non-pregnant Women: 15 Mcg H1N1 Vaccine |
|---|---|---|---|
| Pain | 4 | 8 | 6 |
| Tenderness | 13 | 15 | 14 |
| Swelling | 1 | 2 | 2 |
Participants maintained a memory aid to record daily the occurrence of local reactions of redness and swelling for 8 days after vaccination (Day 0-7). If the reaction was present, the maximum diameter was measured in millimeters (mm). Participants are counted if they reported experiencing the reaction with any measurement greater than 0 mm on any of the 8 days.
| participants | Group 1: Pregnant Women: 15 Mcg H1N1 Vaccine | Group 2: Pregnant Women: 30 Mcg H1N1 Vaccine | Group 3: Non-pregnant Women: 15 Mcg H1N1 Vaccine |
|---|---|---|---|
| Redness | 2 | 2 | 2 |
| Swelling | 1 | 1 | 2 |
Blood was collected from participants at the time of delivery for testing in the HAI assay with Influenza H1N1 2009 virus as the assay antigen. Each sample was tested at least twice according to standard operating procedures and the result of each replicate reported. A participant is counted if the geometric mean of the replicate values was 1:40 or greater.
| participants | Group 1: Pregnant Women: 15 Mcg H1N1 Vaccine | Group 2: Pregnant Women: 30 Mcg H1N1 Vaccine |
|---|---|---|
| Number of Participants With a Serum Hemagglutination Inhibition Assay (HAI) Antibody Titer Greater Than or Equal to 40 Against the Novel Influenza H1N1 2009 Virus in the Maternal Blood at the Time of Delivery | 17 | 16 |
Cord blood was collected at the time of delivery for testing in the HAI assay with Influenza H1N1 2009 virus as the assay antigen. Each sample was tested at least twice according to standard operating procedures and the result of each replicate reported. A participant is counted if the geometric mean of the replicate values was 1:40 or greater.
| participants | Group 1: Pregnant Women: 15 Mcg H1N1 Vaccine | Group 2: Pregnant Women: 30 Mcg H1N1 Vaccine |
|---|---|---|
| Number of Participants With a Serum Hemagglutination Inhibition Assay (HAI) Antibody Titer Greater Than or Equal to 40 Against the Novel Influenza H1N1 2009 Virus in Cord Blood | 17 | 18 |
Participants maintained a memory aid to record daily the occurrence of systemic symptoms of feverishness, malaise, myalgia, headache, and nausea for 8 days after vaccination (Day 0-7) based on their interference with daily activities. Participants are counted if they reported experiencing the symptom at any severity on any of the 8 days.
| participants | Group 1: Pregnant Women: 15 Mcg H1N1 Vaccine | Group 2: Pregnant Women: 30 Mcg H1N1 Vaccine | Group 3: Non-pregnant Women: 15 Mcg H1N1 Vaccine |
|---|---|---|---|
| Feverishness | 0 | 2 | 3 |
| Malaise | 7 | 14 | 4 |
| Myalgia | 1 | 6 | 4 |
| Headache | 8 | 9 | 7 |
| Nausea | 3 | 8 | 3 |
Participants were provided with a thermometer and a memory aid on which to record daily oral temperatures for 8 days after vaccination (Day 0-7). The protocol defined fever as oral temperature of 37.8 degrees Celsius or higher. Participants are counted as experiencing fever if they reported oral temperatures of 37.8 degrees Celsius or higher on any of the 8 days.
| participants | Group 1: Pregnant Women: 15 Mcg H1N1 Vaccine | Group 2: Pregnant Women: 30 Mcg H1N1 Vaccine | Group 3: Non-pregnant Women: 15 Mcg H1N1 Vaccine |
|---|---|---|---|
| Number of Participants Reporting Fever After Vaccination | 1 | 0 | 0 |
Blood was collected from all participants prior to vaccination as well as 21 days after vaccination for testing in the HAI assay with Influenza H1N1 2009 virus as the assay antigen. A participant met the threshold of a 4-fold rise in titer if the Day 0 titer was less than 1:10 (the assay's lowest level of detection) and the Day 21 post vaccination titer was 1:40 or greater, or the Day 0 titer was greater than or equal to 1:10 and the Day 21 post vaccination titer was an increase by 4-fold or more.
| participants | Group 1: Pregnant Women: 15 Mcg H1N1 Vaccine | Group 2: Pregnant Women: 30 Mcg H1N1 Vaccine | Group 3: Non-pregnant Women: 15 Mcg H1N1 Vaccine |
|---|---|---|---|
| Number of Participants With 4-fold or Greater Serum Hemagglutination Inhibition (HAI) Antibody Titer Increases Against Influenza H1N1 2009 Virus Following a Single Dose of H1N1 Vaccine | 18 | 26 | 24 |
Blood was collected from all participants prior to and at Day 21 post vaccination for testing in the HAI assay with Influenza H1N1 2009 virus as the assay antigen. Each sample was tested at least twice according to standard operating procedures and the result of each replicate reported. A participant is counted if the geometric mean of the replicate values was 1:40 or greater.
| participants | Group 1: Pregnant Women: 15 Mcg H1N1 Vaccine | Group 2: Pregnant Women: 30 Mcg H1N1 Vaccine | Group 3: Non-pregnant Women: 15 Mcg H1N1 Vaccine |
|---|---|---|---|
| Day 0 | 5 | 3 | 2 |
| Day 21 | 22 | 27 | 26 |
Collected over Solicited events were collected for 8 days after vaccination, unsolicited events through 21 days after vaccination, and serious adverse events and new onset chronic medical conditions through 180 days after vaccination, including at the time of delivery.. Non-serious events are listed at a 5% frequency threshold.
| Group | Deaths | Serious | Other |
|---|---|---|---|
| Group 1: Pregnant Women: 15 Mcg H1N1 Vaccine | — | 8/28 (28.6%) | 19/28 (67.9%) |
| Group 2: Pregnant Women: 30 Mcg H1N1 Vaccine | — | 6/28 (21.4%) | 24/28 (85.7%) |
| Group 3: Non-pregnant Women: 15 Mcg H1N1 Vaccine | — | 1/28 (3.6%) | 19/28 (67.9%) |
| Event | Group 1: Pregnant Women: 15 Mcg H1N1 Vaccine | Group 2: Pregnant Women: 30 Mcg H1N1 Vaccine | Group 3: Non-pregnant Women: 15 Mcg H1N1 Vaccine |
|---|---|---|---|
| Pre-eclampsiaPregnancy, puerperium and perinatal conditions | 1/28 | 3/28 | 0/28 |
| Respiratory distressRespiratory, thoracic and mediastinal disorders | 2/28 | 1/28 | 0/28 |
| Premature babyPregnancy, puerperium and perinatal conditions | 0/28 | 2/28 | 0/28 |
| Premature labourPregnancy, puerperium and perinatal conditions | 1/28 | 0/28 | 0/28 |
| AmniorrhoeaPregnancy, puerperium and perinatal conditions | 1/28 | 0/28 | 0/28 |
| Vaginal haemorrhageReproductive system and breast disorders | 1/28 | 0/28 | 0/28 |
| Postpartum haemorrhagePregnancy, puerperium and perinatal conditions | 1/28 | 0/28 | 0/28 |
| Premature separation of placentaPregnancy, puerperium and perinatal conditions | 0/28 | 1/28 | 0/28 |
| Renal colicRenal and urinary disorders | 0/28 | 1/28 | 0/28 |
| Thyroid cancerNeoplasms benign, malignant and unspecified (incl cysts and polyps) | 0/28 | 0/28 | 1/28 |
| Event | Group 1: Pregnant Women: 15 Mcg H1N1 Vaccine | Group 2: Pregnant Women: 30 Mcg H1N1 Vaccine | Group 3: Non-pregnant Women: 15 Mcg H1N1 Vaccine |
|---|---|---|---|
| TendernessGeneral disorders | 13/28 | 15/28 | 14/28 |
| MalaiseGeneral disorders | 7/28 | 14/28 | 4/28 |
| HeadacheNervous system disorders | 8/28 | 9/28 | 7/28 |
| NauseaGastrointestinal disorders | 3/28 | 8/28 | 3/28 |
| Injection site painGeneral disorders | 4/28 | 8/28 | 6/28 |
| Upper respiratory tract infectionInfections and infestations | 4/28 | 0/28 | 6/28 |
| MyalgiaMusculoskeletal and connective tissue disorders | 1/28 | 6/28 | 4/28 |
| Feeling hotGeneral disorders | 0/28 | 2/28 | 3/28 |
| InsomniaPsychiatric disorders | 0/28 | 2/28 | 0/28 |
| Injection site erythemaGeneral disorders | 2/28 | 2/28 | 2/28 |
| Age, Categorical(Participants) | Group 1: Pregnant Women: 15 Mcg H1N1 Vaccine | Group 2: Pregnant Women: 30 Mcg H1N1 Vaccine | Group 3: Non-pregnant Women: 15 Mcg H1N1 Vaccine | Total |
|---|---|---|---|---|
| <=18 years | 0 | 0 | 0 | 0 |
| Between 18 and 65 years | 28 | 28 | 28 | 84 |
| >=65 years | 0 | 0 | 0 | 0 |
| Age Continuous(years) | Group 1: Pregnant Women: 15 Mcg H1N1 Vaccine | Group 2: Pregnant Women: 30 Mcg H1N1 Vaccine | Group 3: Non-pregnant Women: 15 Mcg H1N1 Vaccine | Total |
|---|---|---|---|---|
| Mean | 30 ± 6.0 | 28.8 ± 4.9 | 30.8 ± 5.6 | 29.9 ± 5.5 |
| Sex: Female, Male(Participants) | Group 1: Pregnant Women: 15 Mcg H1N1 Vaccine | Group 2: Pregnant Women: 30 Mcg H1N1 Vaccine | Group 3: Non-pregnant Women: 15 Mcg H1N1 Vaccine | Total |
|---|---|---|---|---|
| Female | 28 | 28 | 28 | 84 |
| Male | 0 | 0 | 0 | 0 |
| Region of Enrollment(participants) | Group 1: Pregnant Women: 15 Mcg H1N1 Vaccine | Group 2: Pregnant Women: 30 Mcg H1N1 Vaccine | Group 3: Non-pregnant Women: 15 Mcg H1N1 Vaccine | Total |
|---|---|---|---|---|
| United States | 28 | 28 | 28 | 84 |
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