2020-2021 Nationwide Blood Donor Seroprevalence Survey Infection-Induced Seroprevalence Estimates

CDC is collaborating with the National Institutes of Health (NIH), the Food and Drug Administration (FDA), Vitalant Research Institute (VRI), Westat Inc., and numerous blood collection organizations across the United States to conduct a nationwide COVID-19 seroprevalence survey of blood donors. This is the largest nationwide COVID-19 seroprevalence survey to date. De-identified blood samples are tested for antibodies to SARS-CoV-2 to better understand the percentage of people in the United States who have antibodies against SARS-CoV-2 (the virus that causes COVID-19) and to track how this percentage changes over time. Both SARS-CoV-2 infection and COVID-19 vaccines currently used in the United States result in production of anti-spike (anti-S) antibodies but only infection results in production of anti-nucleocapsid (anti-N) antibodies. Infection-induced seroprevalence estimates the proportion of the population with evidence of previous SARS-CoV-2 infection and refers to the prevalence of the population with both anti-S and anti-N antibodies.

This link connects to a webpage that displays the data from the Nationwide Blood Donor Seroprevalence Survey. It offers an interactive visualization available at https://covid.cdc.gov/covid-data-tracker/#nationwide-blood-donor-seroprevalence

Additional information is available at: https://www.cdc.gov/coronavirus/2019-ncov/cases-updates/blood-bank-serosurvey.html

疾病控制与预防中心（CDC）正与国家卫生研究院（NIH）、食品药品监督管理局（FDA）、Vitalant研究研究所（VRI）、Westat Inc.以及美国众多血液采集机构合作，开展一项全国范围的COVID-19血清流行病学调查。这是迄今为止规模最大的全国性COVID-19血清流行病学调查。去识别化的血液样本经过检测以确定针对SARS-CoV-2（引发COVID-19的病毒）的抗体，旨在更深入地了解美国人群中具有SARS-CoV-2抗体比例，并追踪这一比例随时间的变化。在美国，SARS-CoV-2感染及目前使用的COVID-19疫苗均会导致抗刺突（抗-S）抗体的产生，但只有感染才会导致抗核衣壳（抗-N）抗体的产生。感染引起的血清流行病学估计是指在抗-S和抗-N抗体共存的人群中，先前SARS-CoV-2感染的证据比例，并指代此类人群的流行状况。

此链接连接至一个网页，展示全国血液捐赠者血清流行病学调查的数据。它提供了一个可在https://covid.cdc.gov/covid-data-tracker/#nationwide-blood-donor-seroprevalence找到的交互式可视化。

更多相关信息可查阅：https://www.cdc.gov/coronavirus/2019-ncov/cases-updates/blood-bank-serosurvey.html