Nearly 200 close contacts of people with Covid-19 in Dorset not reached
They failed to acknowledge to Test & Trace they needed to self-isolate.
Fewer than two-thirds of close contacts of people with coronavirus in Dorset are being reached through the test and trace regime.
Data from the Department for Health and Social care shows 149 people who tested positive for Covid-19 in Dorset were transferred to the Test and Trace service between May 28 and September 9.
Coronavirus patients reached by the service are urged to give details for anyone they were in close contact with in the 48 hours before their symptoms started, the NHS says.
A further 574 close contacts were identified in this way in Dorset – also referred to as "non-complex" cases, meaning they could be dealt with through a call centre or online.
But the figures reveal just 65% of those were reached by contact tracers over the period, meaning 199 people did not acknowledge they also needed to self-isolate.
The DHSC says a close contact is not reached when there is no response to text, email or call reminders, or when their communication details were not available.
Across England 64% of non-complex close contacts were reached and told to self-isolate by NHS Test and Trace in the latest week to September 9.
Saffron Cordery, chief executive of NHS Providers, said this falls "well short" of SAGE's 80% target.
She said:
“Trust leaders are increasingly concerned with the current testing shortages impacting on NHS service recovery and winter preparations due to staff and their family members being unable to access a test.
“Additionally, with the number of positive Covid-19 cases increasing, but a reduction in the proportion being contact traced, we are looking at renewed pressure on the NHS."
Baroness Dido Harding, who heads up the NHS Test and Trace service, admitted last week that demand for tests was outstripping capacity but denied claims that the system was "failing".
She suggested around a quarter of those coming forward for a test did not have symptoms.
'New Rules'
Under new rules, from September 28 people in England will legally have to self-isolate for 14 days if they test positive for coronavirus, or they are instructed to do by NHS Test and Trace.
Fines for non-compliance will start at £1,000, rising to £10,000 for repeat offenders, while people on benefits will be eligible for a one-off support payment of £500 if they face a loss of earnings as a result of having to quarantine.