Positive coronavirus cases have been confirmed at three further Glasgow schools and a Renfrewshire school.
Contact tracing is underway at Dalmarnock Primary, St Martha's Primary, Govan High School and Mossvale Primary in Renfrewshire.
There is currently no evidence of internal transmission within the schools.
However, NHS Greater Glasgow and Clyde confirmed contact tracing was not underway in any new organisations.
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A statement from the health board reads: "We are closely monitoring these situations. To respect and maintain patient confidentiality, no further details will be released.
"Apart from those who are identified as close contacts, all other staff and pupils can continue to attend as normal.
"The exception to this applies to East Renfrewshire, Glasgow City and West Dunbartonshire, where additional COVID-19 control measures are in place.
"In these Local Authority areas, any close contacts of someone who has tested positive for COVID-19 are being advised that they and all those in their household group, should self-isolate for 14 days."
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