定期接种疫苗在SEIRS季节性模型中的影响
Enrique C Gabrick1,2,3, Eduardo L Brugnago4, Silvio L T de Souza5
1Potsdam Institute for Climate Impact Research, Telegrafenberg A31, 14473 Potsdam, Germany.
Chaos (Woodbury, N.Y.)
|January 25, 2024
概括
这项研究在季节性疾病模型中比较了三种疫苗接种策略. 定期的脉冲疫苗接种活动,特别是当与传播峰值相匹配时,对于控制感染传播和实现无病状态最有效.
科学领域:
- 流行病学 流行病学
- 数学建模的数学建模
- 公共卫生 公共卫生
背景情况:
- 了解疫苗接种策略对于传染病控制至关重要.
- 季节性强迫和疾病动态影响流行病潜力.
- 评估不同的疫苗接种方法是必要的,以优化公共卫生干预措施.
研究的目的:
- 在季节性SEIRS模型中分析和比较三个不同的疫苗接种策略.
- 确定实现无疾病平衡 (DFE) 所需的最低疫苗接种率和运动参数.
- 调查疫苗接种时间,持续时间和强度对疾病传播和模型动态的影响.
主要方法:
- 使用一个易受-暴露-感染-恢复-易受 (SEIRS) 数学模型与季节性强迫.
- 开发了用于持续接种疫苗的基本繁殖数和DFE条件的分析表达式.
- 进行模拟来评估定期的短期局部和定期脉冲宽度疫苗接种活动.
主要成果:
- 持续的疫苗接种需要最低速率来稳定无病平衡.
- 定期脉冲接种疫苗,特别是当与传播峰值 (44.4%的易感个体) 相匹配时,有效地确保了DFE.
- 脉冲持续时间和基线速率显著提高了运动的有效性,显示了与感染控制的非线性关系.
结论:
- 优化疫苗接种时间和运动设计对于控制传染病至关重要.
- 在这个模型中,定期脉冲疫苗接种策略与连续疫苗接种相比,具有更高的有效性.
- 疫苗接种参数直接影响疾病动态,包括混乱或周期性爆发的可能性.
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