应兰州交通大学霍海峰教授邀请，西安交通大学数学与统计学院教授、博士生导师肖燕妮教授将于2025年10月25-26日与我系相关师生进行学术研讨，并于10月26日上午举行线上学术报告，欢迎各位老师和研究生同学参加。

报告题目: Impact of heterogeneity on the disease transmission dynamics

报告摘要: Human heterogeneity is a critical issue in infectious disease transmission dynamics modelling, and it has recently received much attention in COVID-19 studies. In this talk, we initially illustrate how heterogeneity in susceptible individuals affect the final size by proposing a novel modeling framework. Then, a general human heterogeneous disease model with mutation is proposed to comprehensively study the effects of human heterogeneity on basic reproduction number, final epidemic size and herd immunity. We show that human heterogeneity may increase or decrease herd immunity level, strongly depending on some convexity of the heterogeneity function. Moreover, human heterogeneity may decrease the basic reproduction number but increase the level of herd immunity, implying the unreliability of the basic reproduction number in characterizing the spread and control of infectious diseases with human heterogeneity. Finally, I shall give some concluding remarks.

时间：2025年10月26日10:00-11:00

地点：8-D-311

腾讯会议：948-977-746

    专家简介：肖燕妮教授，西安交通大学数学与统计学院副院长、数学与生命科学交叉研究中心主任、博士生导师，主要从事数据和问题驱动的传染病动力学的研究。参与完成了国家“十一五”、“十二五”和“十三五”科技重大专项艾滋病领域的建模研究。 主持国家自然科学基金多项，包括重点项目1项、重点国际合作1项，主持科技部重点研发课题1项。2022年至今任中国生物数学专业委员会主任，2020年起任国务院第八届学科评议组成员（数学）。