The huge outbreak took place at Kingspark School in Dundee. Two pupils and three community contacts have also become infected with the deadly virus. The results came in after the school was forced to close last week after six adults tested positive for coronavirus, with a further spike in cases announced on Sunday. An investigation is being carried out into the campus at the centre of the spike.
NHS Tayside and Dundee City Council have decided to temporarily shut the education hub until at least next week to allow for a deep clean.
All staff have been urged to self-isolate for two weeks from the last day they were on school grounds.
Pupils have been told to self isolate for 14 days from Thursday, 20 August.
NHS Tayside said on Sunday that 22 people in the area were infected, up from 12 on Friday.
Dundee school outbreak: 17 staff members have tested positive for COVID-19
The board said contact tracing had also identified links to two other schools in Dundee.
One positive case was identified at St Peter’s and St Paul’s primary, and another at Happy Times out-of school club at Downfield primary.
All the pupils in the affected class at St Peter’s and St Paul’s have been asked to stay at home and self-isolate.
Dr Ellie Hothersall, a consultant in public health medicine with NHS Tayside, said: “Since the identification of positive cases at Kingspark, a detailed contact-tracing programme has been under way and these linked cases are being identified because of those concerted efforts of test and protect.
“We must do everything we can to protect all of our communities against Covid-19 and that is why we have issued the guidance to self-isolate. By taking this action we are containing any further spread of infection.
“We know that this may cause anxiety to some parents and children but we must do everything we can to ensure we keep people safe.”
The outbreaks are the latest in a series linked to Scottish schools since classes resumed in Scotland earlier on this month.
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Some cases have lead to entire classes being told to remain at home and self isolate.
Cases have been popping up in schools in Glasgow, Perth, Blairgowrie, Paisley, Johnstone and Coatbridge.
Scotland’s COVID-19 infection rate began to climb after schools reopened.
This brings an end to weeks of falling infection rates in Scotland.
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