World Health Organization, Regional Office for Africa, Brazzaville, Congo.
Institute of Global Health, University of Geneva, Geneva, Switzerland.
Epidemiol Infect. 2021 Nov 4;149:e263. doi: 10.1017/S0950268821002429.
The World Health Organization African region recorded its first laboratory-confirmed coronavirus disease-2019 (COVID-19) cases on 25 February 2020. Two months later, all the 47 countries of the region were affected. The first anniversary of the pandemic occurred in a changed context with the emergence of new variants of concern (VOC) and growing COVID-19 fatigue. This study describes the epidemiological trajectory of COVID-19 in the region, summarises public health and social measures (PHSM) implemented and discusses their impact on the pandemic trajectory. As of 24 February 2021, the African region accounted for 2.5% of cases and 2.9% of deaths reported globally. Of the 13 countries that submitted detailed line listing of cases, the proportion of cases with at least one co-morbid condition was estimated at 3.3% of all cases. Hypertension, diabetes and human immunodeficiency virus (HIV) infection were the most common comorbid conditions, accounting for 11.1%, 7.1% and 5.0% of cases with comorbidities, respectively. Overall, the case fatality ratio (CFR) in patients with comorbid conditions was higher than in patients without comorbid conditions: 5.5% vs. 1.0% (P < 0.0001). Countries started to implement lockdown measures in early March 2020. This contributed to slow the spread of the pandemic at the early stage while the gradual ease of lockdowns from 20 April 2020 resulted in an upsurge. The second wave of the pandemic, which started in November 2020, coincided with the emergence of the new variants of concern. Only 0.08% of the population from six countries received at least one dose of the COVID-19 vaccine. It is critical to not only learn from the past 12 months to improve the effectiveness of the current response but also to start preparing the health systems for subsequent waves of the current pandemic and future pandemics.
世界卫生组织非洲区域于 2020 年 2 月 25 日报告了首例经实验室确认的 2019 冠状病毒病(COVID-19)病例。两个月后,该区域的 47 个国家全部受到影响。大流行一周年之际,情况发生了变化,出现了令人关切的新变异株(VOC),COVID-19 疲劳感也在加剧。本研究描述了该区域 COVID-19 的流行病学轨迹,总结了实施的公共卫生和社会措施,并讨论了这些措施对大流行轨迹的影响。截至 2021 年 2 月 24 日,非洲区域占全球报告病例的 2.5%,占全球死亡人数的 2.9%。在提交病例详细清单的 13 个国家中,至少有一种合并症的病例比例估计占所有病例的 3.3%。高血压、糖尿病和人类免疫缺陷病毒(HIV)感染是最常见的合并症,分别占合并症病例的 11.1%、7.1%和 5.0%。总体而言,有合并症的患者的病死率(CFR)高于无合并症的患者:5.5%对 1.0%(P<0.0001)。各国于 2020 年 3 月初开始实施封锁措施。这有助于在早期阶段减缓大流行的传播,而 2020 年 4 月 20 日逐步放宽封锁则导致病例激增。2020 年 11 月开始的第二波大流行与新的令人关切的变异株的出现同时发生。来自六个国家的人口中,只有 0.08%至少接种了一剂 COVID-19 疫苗。不仅要从过去 12 个月中吸取教训,以提高当前应对措施的有效性,而且要开始为当前大流行和未来大流行的后续浪潮做好卫生系统的准备,这一点至关重要。