More than 13,000 people across Nottinghamshire were sent a contact tracing notification via the NHS Covid-19 mobile app at the start of July.
Contact tracing alerts are sent out via the NHS Covid-19 application to a close contact of a positive case, which is determined using the built-in Bluetooth feature.
App users can log their test result via the app, and close contacts will then receive a push notification alerting them to self-isolate and for how long.
The app uses an algorithm to determine a close contact of a positive case, based on the Bluetooth signal strength, the length of time near to the other device, and the level of infectiousness.
People may also be contacted by NHS Test and Trace, who will typically attempt to contact close contacts via a mobile number.
Isolation typically lasts 10 days, and the NHS app will provide a countdown.
For now, those who are double-jabbed still need to follow the rules on self-isolation, but from August 16, those who have allowed their second jab a fortnight to take effect will not have to self-isolate if they come into close contact with someone who has Covid.
The latest data shows how the number of pings have increased substantially over the past two months, particularly in Nottingham and areas where the number of cases have been increasing sharply.
The Government’s dashboard is now providing the latest data on how many alerts have been sent out on a weekly basis.
It covers all weeks from the start of the year to July 7 (the latest available data)
Number of contact tracing alerts sent out between July 1 and July 7:
Newark and Sherwood: 1,035
Nottinghamshire total: 13,301