Households all over Spain were invited at random by the research team to take part in the study, which aimed to determine the proportion of the population that had developed antibodies for the coronavirus.

研究团队随机邀请西班牙各地的家庭参与这项研究，该研究旨在确定产生新冠病毒抗体的人占西班牙人口的比例。

A total of 61,075 people agreed to participate in the study, which was carried out between April 27 and May 11. Participants answered a questionnaire on coronavirus symptoms, were given a point-of-care finger prick test, and had the option to donate blood for further laboratory testing (which 51,958 of the people in the study did).

总共有61075人同意参与这项研究，研究于4月27日到5月11日期间进行。参与者要填写一份关于新冠肺炎症状的问卷，接受即时手指点刺检测，并可选择是否捐血进行进一步的实验室测试 point-of-care: 即时的

A woman adjusts her face mask as she walks out of a store advertising going-out-of-business sales, amid the coronavirus disease (COVID-19) outbreak, in Madrid, Spain, July 8, 2020. REUTERS/Susana Vera

Just 5% of participants presented with antibodies from point-of-care tests, while antibodies were detected in 4.6% of the blood samples.

手指点刺检测中只有5%的参与者发现了抗体，提交的血液样本中有4.6%检测出了抗体。

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