How the NHS contact tracing app works

1

Person A downloads the contact tracing app and enables Bluetooth

2

Her phone logs distance data with any phones that are nearby

3

Data is anonymous for A and everybody she comes in contact with

4

If person A falls ill she notifies the app that she has symptoms

5

The data gathered by her phone is uploaded to a central server

6

People who have been in close contact with her are sent an alert and further advice

1

2

3

Person A downloads the contact tracing app and enables Bluetooth

Her phone logs distance data with any phones that are nearby

Data is anonymous for A and everybody she comes in contact with

4

5

6

If person A falls ill she notifies the app that she has symptoms

The data gathered by her phone is uploaded to a central server

People who have been in close contact with her are sent an alert and further advice