免疫丧失对年龄结构流行病学模型的最佳疫苗接种策略的影响
Amira Bouhali1,2, Walid Ben Aribi1,3, Slimane Ben Miled1
1BioInformatics, bioMathematics and bioStatistics (BIMS-LR16IPT09), Institute Pasteur of Tunis, University of Tunis El Manar, Tunis 1002, Tunisia.
Mathematical biosciences and engineering : MBE
|August 23, 2024
概括
优化COVID-19疫苗接种策略需要考虑年龄结构和免疫损失. 较高的最大疫苗接种率减少了关键感染,而年龄相关的疫苗接种率在资源有限的场景中提供了灵活性.
科学领域:
- 流行病学 流行病学
- 数学生物学 数学生物学
- 公共卫生 公共卫生
背景情况:
- COVID-19疫苗接种策略面临着免疫力下降和疾病动态变化的挑战.
- 有效的疫苗接种需要了解年龄结构和免疫损失,才能进行最佳的公共卫生干预.
研究的目的:
- 通过分析年龄结构,免疫力学动态和最大的疫苗接种率来研究COVID-19的最佳年龄依赖疫苗接种策略.
- 通过使用数学建模来最大限度地减少关键感染并优化疫苗接种工作.
主要方法:
- 制定了一个分为$n$年龄类别的分层SEIR模型,将年龄相关的疫苗接种率作为控制变量.
- 开发了一个客观的功能,以尽量减少关键的感染和优化疫苗接种.
- 进行了数学分析,以确定最佳控制的存在和表征.
- 使用来自不同年龄分布的国家数据进行了数值模拟.
主要成果:
- 最大疫苗接种率显著影响最佳的疫苗接种策略.
- 根据人口统计数据优先考虑年龄组在恒定的最大疫苗接种率下是有效的.
- 较高的疫苗接种率导致所有年龄分布的危急感染减少.
- 取决于年龄的最大疫苗接种率,虽然可行,但与恒定率相比,可能并不总是最大限度地减少关键感染峰值.
结论:
- 最佳的COVID-19疫苗接种策略对最大的疫苗接种率和人口年龄结构都很敏感.
- 基于年龄的优先级是有效的,特别是在更高的疫苗接种能力的情况下.
- 年龄取决于疫苗接种策略为资源有限的环境提供了一种实际的方法,平衡有效性与可行性.
相关概念视频
Vaccinations
44.2K
Overview
44.2K
Factors Affecting the Risk of Infection
11.5K
The hosts' susceptibility to infection depends on several factors. The integrity of the skin and mucous membranes helps protect the body against microbial attacks. When the skin is altered, the chance of infection, limb loss, and even death increases.
The integrity and count of the white blood cells help the body resist pathogens and fight infection. When impaired, it reduces the body's resistance to pathogens. The acidic pH levels of the gastrointestinal, genitourinary tracts, and skin...
The integrity and count of the white blood cells help the body resist pathogens and fight infection. When impaired, it reduces the body's resistance to pathogens. The acidic pH levels of the gastrointestinal, genitourinary tracts, and skin...
11.5K
Immunological Memory
565
Immunological memory, a pivotal pillar of the adaptive immune system, is responsible for the body's ability to remember and respond more swiftly and effectively to previously encountered pathogens. This remarkable feature is what makes vaccines so effective in preventing diseases.
What is Immunological Memory?
Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature...
What is Immunological Memory?
Immunological memory is an integral function of the immune system that allows it to recognize and react more rapidly and effectively to pathogens previously encountered. This feature...
565
Immunodeficiency Diseases
926
Immunodeficiency disorders are conditions in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. The immune system comprises a complex network of cells, tissues, and organs that work together to protect the body from potentially harmful invaders. When this system is deficient or not functioning properly, it leaves the body susceptible to infections, diseases, or other complications.
There are three main causes of immunodeficiency...
There are three main causes of immunodeficiency...
926
Immune Response Against Viral Pathogens
765
The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
765
Active versus Passive Immunity
598
Immunity, along with the ability to limit pathogen growth to prevent significant body tissue damage, can be gained either by (1) actively developing an immune response within the individual after exposure to a pathogen or after getting vaccinated or (2) passively transferring immune components from an immune individual to one who is nonimmune. Both these forms of immunity can be found naturally and in medical practices.
Active Immunity
Active immunity refers to the resistance one develops...
Active Immunity
Active immunity refers to the resistance one develops...
598


