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  • 1z40kx33f?file=thumbnail
    Article
    Li, Tong
    Mathematical models are used to determine if infection wave fronts could occur by traveling geographically in a loop around a region or continent. These infection wave fronts arise by Hopf bifurcation for some spatial models for infectious disease tra . . .
  • Qr46r346h?file=thumbnail
    Article
    Jing, Zhujun
    Pertussis (whooping cough) incidence in the United States has oscillated with a period of about four years since data was first collected in 1922. An infection with pertussis confers immunity for several years, but then the immunity wanes, so that rei . . .