■COVID-19大流行引起了广泛的发病率,死亡率,和世界范围内的社会经济破坏。事实证明,接种疫苗是控制病毒传播和减轻其影响的关键策略。
■该研究的重点是评估COVID-19疫苗接种在降低阳性病例发生率方面的有效性,住院治疗,ICU入院。这项研究的重点是COVID-19完全接种疫苗的人群,考虑了截至2021年9月20日报告的第一例阳性病例的数据。
■使用来自多个国家的数据,时间序列分析用于调查COVID-19阳性率的变化,住院率,以及在全国范围内成功开展疫苗接种运动后对ICU的要求。
对COVID-19阳性率的分析显示,疫苗接种率较高的国家大幅下降。在接种疫苗的1-3个月内,这些比率下降了20-44%。然而,随着新的三角洲变种的出现,某些国家的阳性率有所提高,强调持续监测和适应性疫苗接种策略的重要性。同样,对住院率的分析表明,随着各国疫苗接种驱动率的上升,住院率稳步下降.接种疫苗后90天内,几个国家的住院率低于百万分之200。然而,接种疫苗180天后,一些国家的住院人数略有增加,强调需要继续保持警惕。此外,随着大多数国家疫苗接种率的增加,ICU患者发病率下降.在120天内,几个国家的ICU患者率达到了百万分之20,强调疫苗接种在预防需要重症监护的严重病例方面的有效性。
■COVID-19疫苗已被证明对降低病例发生率非常有效,住院治疗,ICU入院。然而,持续监视,变体监测,和适应性疫苗接种策略对于最大限度地发挥疫苗接种的效益和有效控制病毒传播至关重要。
The COVID-19 pandemic has caused widespread morbidity, mortality, and socio-economic disruptions worldwide. Vaccination has proven to be a crucial strategy in controlling the spread of the virus and mitigating its impact.
The study focuses on assessing the effectiveness of COVID-19 vaccination in reducing the incidence of positive cases, hospitalizations, and ICU admissions. The presented study is focused on the COVID-19 fully vaccinated population by considering the data from the first positive case reported until 20 September 2021.
Using data from multiple countries, time series analysis is deployed to investigate the variations in the COVID-19 positivity rates, hospitalization rates, and ICU requirements after successful vaccination campaigns at the country scale.
Analysis of the COVID-19 positivity rates revealed a substantial decline in countries with high pre-vaccination rates. Within 1-3 months of vaccination campaigns, these rates decreased by 20-44%. However, certain countries experienced an increase in positivity rates with the emergence of the new Delta variant, emphasizing the importance of ongoing monitoring and adaptable vaccination strategies. Similarly, the analysis of hospitalization rates demonstrated a steady decline as vaccination drive rates rose in various countries. Within 90 days of vaccination, several countries achieved hospitalization rates below 200 per million. However, a slight increase in hospitalizations was observed in some countries after 180 days of vaccination, underscoring the need for continued vigilance. Furthermore, the ICU patient rates decreased as vaccination rates increased across most countries. Within 120 days, several countries achieved an ICU patient rate of 20 per million, highlighting the effectiveness of vaccination in preventing severe cases requiring intensive care.
COVID-19 vaccination has proven to be very much effective in reducing the incidence of cases, hospitalizations, and ICU admissions. However, ongoing surveillance, variant monitoring, and adaptive vaccination strategies are crucial for maximizing the benefits of vaccination and effectively controlling the spread of the virus.