世界卫生组织和联合国儿童基金会于2020年7月15日发出警告，新冠疫情中断免疫接种服务，导致全球儿童疫苗接种覆盖率出现令人担忧的下降。1根据初步数据，2020年1月至4月期间，儿童完成白喉-破伤风-百日咳三联疫苗（DTP3）三剂接种的人数大幅下滑，这是过去28年来首次出现全球DTP3覆盖率的下降。1至少30场麻疹疫苗接种活动被取消或面临风险。1
调查显示，在受访的82个国家中，约四分之三在2020年5月前因新冠相关原因报告了免疫接种项目的中断。12019年全球DTP3和麻疹疫苗覆盖率停滞在85%，同年约有1400万儿童错过了包括麻疹和DTP3在内的救命疫苗，其中三分之二集中在安哥拉、巴西、刚果民主共和国、埃塞俄比亚、印度、印度尼西亚、墨西哥、尼日利亚、巴基斯坦和菲律宾这10个中低收入国家。1拉丁美洲和加勒比地区形势尤为严峻，巴西、玻利维亚、海地和委内瑞拉的免疫接种覆盖率自2010年以来已下降至少14个百分点。1
世卫组织总干事谭德塞表示："疫苗是公共卫生历史上最强大的工具之一……但大流行已经使这些成果面临风险。"1联合国儿童基金会执行主任亨丽埃塔·福尔指出："我们必须防止疫苗覆盖率进一步恶化，并迫切需要恢复疫苗接种计划。"1
The World Health Organization and UNICEF issued a stark warning on July 15, 2020, that COVID-19 disruptions to immunization services have triggered a concerning global decline in childhood vaccination rates 1. Preliminary data covering January through April 2020 documented a significant drop in the number of children completing the three-dose diphtheria-tetanus-pertussis vaccine series (DTP3), marking the first decline in global DTP3 coverage in 28 years 1. At least 30 measles vaccination campaigns have been canceled or face the risk of cancellation 1.
The disruption extends far beyond isolated incidents. Among 82 countries surveyed, approximately three-quarters reported vaccination program interruptions attributed to COVID-19 by May 2020 1. In 2019, global DTP3 and measles vaccine coverage stalled at 85%, with nearly 14 million children missing these life-saving vaccines 1. Two-thirds of those missed vaccinations occurred in ten lower-middle-income countries—Angola, Brazil, Democratic Republic of Congo, Ethiopia, India, Indonesia, Mexico, Nigeria, Pakistan, and the Philippines 1. Latin America and the Caribbean face particular concern, with Brazil, Bolivia, Haiti, and Venezuela experiencing vaccination coverage declines of at least 14 percentage points since 2010 1.
WHO Director-General Tedros Adhanom Ghebreyesus stated: "Vaccines are among the most powerful tools in the history of public health… but the pandemic has put these gains at risk" 1. UNICEF Executive Director Henrietta Fore emphasized the urgency, saying: "We must prevent further deterioration in vaccine coverage, and there is an urgent need to restore immunization programmes" 1.
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