NHS England COVID-19 Exposure Notification App and Test Availability Data

This dataset was scraped from the API serving the NHS COVID-19 App for England and Wales, and the NHS COVID-19 test availability service. It contains the following files: <strong>exposure_keys.csv</strong><br> Metadata associated with the published exposure keys for the Bluetooth Google/Apple Exposure Notification (GAEN) system. The actual broadcast keys were not collected, only the metadata attached to them. The columns in the table match those in the exposure key export format, with the exception of the "export_date" field which is the "end_timestamp" of the key export in which that key was first seen. This file is believed to be complete between 2020-09-13 and 2023-04-29 when the NHS COVID-19 app was retired. <strong>exposure_configuration.csv</strong><br> This table contains the NHS COVID-19 App's exposure configuration JSON file fetched from the API, with a new record inserted whenever this changed. History of this file is also available in the app's git repository, and entries in this file from before 2021-07-11 were imported from there. The timestamps for entries dated since that point will match the time that the configuration was published to the API, which may not be the case for the git repository as this was normally updated after a delay. <strong>risky_venues.csv</strong><br> "Risky venue" notification data for the COVID-19 App. This was an NHS App-specific feature, not part of the GAEN specification, which allowed users to "check in" to a venue and receive a notification if they were present at the same time as someone who subsequently tested positive for COVID-19. This file is believed to be complete between 2020-09-24 and 2022-02-22 (when it appears the "risky venue" feature was retired), with a known data collection gap between 2021-08-03 and 2021-08-06. <strong>walk_in_pcr_availability.csv</strong><br> Walk-in PCR test availability for the entire UK, used by the NHS PCR test booking service. This contains JSON objects provided by the API, which are broken down by region. A new row was inserted whenever this JSON object changed. This file is believed to be complete between 2021-12-27 and 2022-03-30 (after which it appears the online test booking service was retired). <strong>home_test_availability.csv</strong><br> Home test (PCR or Lateral Flow Device) availability, for the public and for "key workers" who had priority ordering PCR tests. A new row was inserted whenever the availability changed. This file is believed to be complete between 2021-12-27 and 2022-08-22 when the data ended. The final version of the source code used to fetch this data is available here.本数据集通过爬取面向英格兰及威尔士地区的NHS COVID-19应用以及NHS COVID-19检测服务的API接口获取，包含以下文件： **exposure_keys.csv**：包含与蓝牙谷歌/苹果暴露通知（Google/Apple Exposure Notification, GAEN）系统中已发布的暴露密钥相关的元数据。未采集实际的广播密钥，仅收录其关联元数据。该表格的列与暴露密钥导出格式保持一致，仅"export_date"字段除外——此字段为该密钥首次被收录的密钥导出的"end_timestamp"。据信该文件的完整数据覆盖时段为2020年9月13日至2023年4月29日，即NHS COVID-19应用停用之时。 **exposure_configuration.csv**：该表格包含从API接口获取的NHS COVID-19应用的暴露配置JSON文件，每当配置发生变更时即新增一条记录。该文件的历史记录亦可在该应用的Git仓库中获取，2021年7月11日之前的条目均从该仓库导入。2021年7月11日之后的记录时间戳与配置发布至API的时间一致，而Git仓库通常存在延迟更新的情况，因此Git仓库中的记录时间可能与此不符。 **risky_venues.csv**：包含COVID-19应用的“风险场所”通知数据。该功能为NHS应用专属特性，不属于GAEN规范范畴，允许用户在场所完成“签到”，若用户与后续新冠病毒检测呈阳性的人员同时在场，则会收到通知。据信该文件的完整数据覆盖时段为2020年9月24日至2022年2月22日，即“风险场所”功能停用之时，已知2021年8月3日至2021年8月6日期间存在数据采集缺口。 **walk_in_pcr_availability.csv**：包含全英范围内的步行式聚合酶链式反应（PCR）检测点可用情况数据，供NHS PCR检测预约服务使用。其中包含按地区划分的JSON对象，每当该JSON对象发生变更时即新增一行记录。据信该文件的完整数据覆盖时段为2021年12月27日至2022年3月30日，即线上检测预约服务停用之时。 **home_test_availability.csv**：包含面向公众以及可优先预约PCR检测的“关键工作者”的家庭检测（PCR检测或侧向流装置（Lateral Flow Device）可用情况数据，每当检测可用情况发生变更时即新增一行记录。据信该文件的完整数据覆盖时段为2021年12月27日至2022年8月22日，即该数据集终止之时。用于采集该数据的源代码最终版本可在此处获取。