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With lower infection rates and morę widespread testing, it is now feasible for the EU5 nations to use contact tracing and isolation to control CON/ID-19

Contact tracing - typical approach

Case study - South Korea

Finding

Tracing

Isolating

Patient A develops symptoms

Contact tracers will ask Patient A about their close contacts

Patient A and close contacts will be asked to quarantine for 14 days

Diagnostic testing

Patient A takes

Oj • PCR test

/ to determine • * presence of

SARS-CoV-2

Positive

result

f

Negative result No further measures

Close contacts

•    People they've recently been < 2m from > 15min

•    People they've recently been < 1m no mattertime period

Contact tracers will identify clusters of infection and mass test the cluster

Symptoms

developed

Return to step 2

No symptoms developed No further measures

•    South Korea implemented contact tracing and testing early in its epidemie, which is credited with their success at controlling the virus without needing to resort to national lockdown measures

•    The scheme implemented is characterised by two components:

-    Cluster investigation - where outbreaks in specific communities, such as hospitals, workplaces or churches are addressed by widespread testing of all of its members. 68% of cases were found through cluster investigation

-    Individual contact tracing - where all those who have come into contact with an individual are traced and contacted. 11% of cases have been found through individual contact tracing

•    Sufficient testing capacity was critical to South Korea’s success, but having succeeded in keeping the virus to comparatively Iow levels, they have not needed to scalę capacity further

Notę:    * when no individual room available, or when high-risk person living in household

Source: Report 25 ■ Response to COVID-19 in South Korea and impticatfons for lifting stringent interventions, Imperial College COVID-19 Response Team, 29 May 2020

15 O 2020 L E K. Consulting LLC