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ABSTRACT: Methods
The study population includes participants enrolled in the COVID Symptom Study smartphone application in the United Kingdom and the United States (March-November 2020). All participants were encouraged to report their current health condition and suspected risk factors for COVID-19. We used a validated symptom-based classifier that predicts COVID-19-like illness. We estimated the Normalized Difference Vegetation Index (NDVI), for each participant's reported neighborhood of
SUBMITTER: Chen K
PROVIDER: S-EPMC9916094 | biostudies-literature | 2023 Feb
REPOSITORIES: biostudies-literature