COVID-19 — Worldwide/Unknown
Public health authorities across the world have been trying to contain the spread of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) via public awareness and contact tracing — that is, by identifying and isolating individuals at high risk of being positive./1 In many countries, regular mass swab testing is still inadequate. To reduce the number of infectious people in the community, it is therefore crucial to use the symptom combinations that can identify them.
Using
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