PM Boris Johnson and Chris Whitty answer questions form media about track and trace app

The video discusses the importance of the track and trace system in controlling the spread of coronavirus. It emphasizes the need for self-isolation when contacted by the system, explaining that this is crucial to breaking the chains of transmission. The video also covers the infectious period of the virus, highlighting that individuals can be infectious before showing symptoms. Testing during the incubation period may yield negative results, which is why self-isolation is vital even without symptoms.

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