Fluctuations in Antibody Titers against Enterovirus D68 in Pediatric Sera Collected in a Community before, during, and after a Possible Outbreak

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  • Kadji Francois Marie Ngako
    Virus Research Center, Clinical Research Division, Sendai Medical Center Department of Virology, Tohoku University Graduate School of Medicine
  • Nishimura Hidekazu
    Virus Research Center, Clinical Research Division, Sendai Medical Center
  • Okamoto Michiko
    Department of Virology, Tohoku University Graduate School of Medicine
  • Sato Ko
    Virus Research Center, Clinical Research Division, Sendai Medical Center
  • Ohmiya Suguru
    Virus Research Center, Clinical Research Division, Sendai Medical Center
  • Ito Hiroko
    Virus Research Center, Clinical Research Division, Sendai Medical Center
  • Suzuki Akira
    Virus Research Center, Clinical Research Division, Sendai Medical Center Department of Virology, Tohoku University Graduate School of Medicine Miyagi Prefecture Ishinomaki Public Health Center
  • Nagai Yukio
    Nagai Children’s Clinic
  • Oshitani Hitoshi
    Department of Virology, Tohoku University Graduate School of Medicine

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<p>We previously reported a hospital-based epidemiological study on enterovirus (EV)-D68 infection among children during the autumn of 2015, which indirectly inferred an outbreak in Sendai, Japan. In this study, stocked sera of children (aged 0–6 years; without symptoms of infectious diseases) in the Sendai community collected during 4 periods (1 year before, 6 months before, immediately after, and 1 year after the possible outbreak period) were analyzed using the neutralization antibody titer assay to determine community children’s immunity levels against EV-D68 infection. The immunity levels were confirmed to have increased during the possible outbreak period and to have gradually waned over 1 year without another outbreak. These results provide background information supporting the results of our previous hospital-based surveillance study.</p>

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