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Swine flu vaccine safe in pregnancy: study

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  • Swine flu vaccine safe in pregnancy: study

    (Reuters Health) - The swine flu shot appears to be safe for pregnant women, according to a new government report that tallies health problems occurring after the vaccinations.

    During the 2009 and 2010 flu seasons, millions of pregnant women received the vaccine against swine flu, or H1N1 influenza, yet but less than 300 possible complications were reported to a national database.

    Researchers estimated that out of one million pregnant women who received the vaccine, 118 experienced a potential side effect from the shot.

    These findings support the official recommendation that pregnant women receive the seasonal flu vaccine, which will contain the H1N1 vaccine in the upcoming flu season, said study author Dr. Pedro Moro of the U.S. Centers for Disease Control and Prevention.

    "Based on all the information we have available, we definitely think pregnant women should receive the flu shot in the 2011-12 season," Moro told Reuters Health. "The flu shot will protect pregnant women, their unborn babies, and protect the baby after birth."

    Compared with women of the same age who aren't pregnant, expecting mothers are more likely to become seriously ill from a flu infection and need hospitalization.

    According to the CDC, pregnant women accounted for one in 20 deaths from H1N1 influenza in 2009. By comparison, only one in 100 was pregnant in the population.


  • #2
    Re: Swine flu vaccine safe in pregnancy: study

    Adverse events following administration to pregnant women of influenza A (H1N1) 2009 monovalent vaccine reported to the Vaccine Adverse Event Reporting System

    Pedro L. Moro MD, MPH1, Corresponding Author Contact Information, E-mail The Corresponding Author, Karen Broder MD1, Yenlik Zheteyeva MD, MPH2, Natalya Revzina MD3, Naomi Tepper MD, MPH3, Dmitry Kissin MD, MPH3, Faith Barash MD, MPH4, Jorge Arana MD, MPH1, Mary D. Brantley MPH5, Helen Ding MD, MSPH6, James A. Singleton MS6, Kimp Walton MS1, Penina Haber MPH1, Paige Lewis MSPH1, Xin Yue MS1, Frank Destefano MD, MPH1 and Claudia Vellozzi MD, MPH1

    1 Immunization Safety Office, Division of Healthcare Quality Promotion,National Center for Emerging and Zoonotic Infectious Diseases (NCEZID), Centers for Disease Control and Prevention (CDC)

    2 Epidemic Intelligence Service, Office of Workforce and Career Development, Office of the Director

    3 Women's Health and Fertility Branch, Division of Reproductive Health,National Center for Chronic Disease Prevention and Health Promotion (NCCDPHP), CDC

    4 Office of Biostatistics and Epidemiology, Center for Biologics Evaluation and Research, Food and Drug Administration

    5 Applied Sciences Branch, Division of Reproductive Health, NCCDPHP, CDC

    6 Assessment Branch, Immunization Services Division, National Center for Immunization and Respiratory Diseases, CDC
    Received 15 February 2011;
    revised 27 April 2011;
    accepted 9 June 2011.
    Available online 21 June 2011.


    To evaluate and summarize reports to the Vaccine Adverse Event Reporting System (VAERS), a spontaneous reporting system, in pregnant women who received Influenza A (H1N1) 2009 Monovalent Vaccine to assess for potential vaccine safety problems.

    We reviewed reports of adverse events (AEs) in pregnant women who received 2009-H1N1 vaccines from 10/01/2009-02/28/2010.

    VAERS received 294 reports of AEs in pregnant women who received 2009-H1N1 vaccine:288 after inactivated and 6 after the live attenuated vaccines. Two maternal deaths were reported. Fifty-nine (20.1%) women were hospitalized. We verified 131 pregnancy-specific outcomes: 95 spontaneous abortions (<20 weeks), 18 stillbirths (≥20 weeks), 7 preterm deliveries (<37 weeks), 3 threatened abortions, 2 preterm labor, 2 preeclampsia, and 1 each of fetal hydronephrosis, fetal tachycardia, intrauterine growth retardation, and cleft lip.

    Review of reports to VAERS following H1N1 vaccination in pregnant women did not identify any concerning patterns of maternal or fetal outcomes.