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Monitoring the Status of Multi-Wave Omicron Variant Outbreaks-71 Countries,2021–2023

China CDC weekly 2024年第41期6卷 1054-1058页

作者： Chuanqing Xu lianjiao dai Songbai Guo Xiaoyu Zhao Xiaoling Liu School of Science Beijing University of Civil Engineering and ArchitectureBeijingChina School of Mathematics Shandong UniversityJinan CityShandong ProvinceChina Hanshan Normal University Chaozhou CityGuangdong ProvinceChina.

What is already known about this topic?Analyzing the characteristics of epidemic development after the emergence of the severe acute respiratory syndrome virus 2 Omicron variants with its subvariants and the impact of income level inequalities on the coronavirus disease 2019(COVID-19)case-fatality ratio helps to better understand the spread of novel coronavirus *** is added by this report?The median time interval between the first and second waves of Omicron sub-variants was 70 days(interquartile spacing:43.75–91),and between the second and third waves was 87.5 days(interquartile spacing:49–119),which obeyed a lognormal *** case-fatality ratio of the first wave was significantly higher than that of the second and third *** the initial epidemic period,there was no significant geographic differences in the case-fatality ratio of the first wave,while the case-fatality ratio in countries with high income levels was significantly lower than in countries with other income *** are the implications for public health practice?We still need to pay attention to the COVID-19 pandemic,as inequalities in income levels have an impact on the case-fatality ratio during the early stages of Omicron *** most countries,strains of the virus are likely to move from low to high population prevalence after 2–4 months.

关键词： spacing inequalities wave

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