Around 1,000 pupils have been sent home from Dumfries and Galloway schools this term amid Covid scares.Youngsters have been instructed to take a PCR test at home and, when a negative result appears, they are generally back in class within a day.The precautionary measures have been effective and head teachers have reported that the process works well to ensure education isn’t badly disrupted.However, there is still a risk of a class being sent home or entire school being closed if 20 per cent of pupils test positive for Covid.Annie Johnson is the Dumfries and Galloway Council officer leading on the testing programme in partnership with Public Health Scotland colleagues.Speaking at the council’s response, renewal and recovery sub-committee