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. 2010 Apr 9;28(17):2957-64.
doi: 10.1016/j.vaccine.2010.02.016. Epub 2010 Feb 25.

Protection of pregnant mice, fetuses and neonates from lethality of H5N1 influenza viruses by maternal vaccination

Seon Do Hwang  1 , Jin Soo Shin, Keun Bon Ku, Hyun Soo Kim, Sung Whan Cho, Sang Heui Seo
Affiliations

Protection of pregnant mice, fetuses and neonates from lethality of H5N1 influenza viruses by maternal vaccination

Seon Do Hwang et al. Vaccine. .

Abstract

The highly pathogenic H5N1 influenza viruses are one of candidates for the next pandemic. Information on protective immunity for pregnant animals by vaccination against the H5N1 influenza virus is limited. Here, we show that the immunization of pregnant mice with inactivated H5N1 influenza vaccine protects them, their fetuses, and their infant mice from H5N1 influenza viruses. Pregnant mice immunized with two doses of H5N1 influenza vaccine were protected from homologous infections of H5N1 influenza viruses with no viruses detected in fetuses, and that they were protected upto 30% from heterologous infections of H5N1 influenza viruses with viruses detected in fetuses. The infant mice born to mothers immunized with H5N1 influenza vaccine were fully protected from infections of H5N1 influenza viruses for upto 4 weeks of age. The protection of infant mice was closely related to the presence of IgG2a antibody in lung, heart, and rectum tissues. Our results suggest that maternal vaccination may be critical for protecting pregnant animals, their fetuses, and their infant mice from lethal infections of H5N1 influenza viruses.

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