A primary school in the tiny South West town of Allanson has become the first regional school to report a positive COVID-19 case, with a whole class forced to isolate. Allanson Primary School, near Collie, was one of a raft of schools to contact parents over the weekend to alert them to infections detected in their communities. Principal Simon Paton said in a notice to parents the positive case had attended a mixed Year 2 and 3 class while infectious on Thursday. All students in the class have been urged to get tested immediately and quarantine until contacted by WA Health. At the weekend, Kalamunda Senior High School, Somerly Primary School in Clarkson, Westminster Primary School in Balga and Balga Primary School were added to the growing list of schools where infections have been detected. It comes as 10 more cases have been confirmed at Doubleview Primary School after parents were first notified of just one case on Friday. Three cases have been reported at Westminster Primary, all associated with one Year 2 class who were infectious while at the school between Monday and Friday. “If your child was in the Year 2, room 24 class between February 7 and 11, and you have not yet been contacted by WA Health, you should get your child tested immediately and isolate for seven days from the date of exposure,” principal Andrea White wrote. All students and staff who were in Somerly’s Pre-primary room 2 on Thursday or Friday have been directed to isolate and get tested. Children in one of Balga Primary School’s Year 1 classes have also been sent home after they were exposed between Monday and Thursday. The confirmed case at Kalamunda SHS was in the school while infectious on Thursday and Friday last week. The schools have joined Morley’s Hampton Senior High as the latest in a string of COVID-affected schools, now numbering more than 20. Hampton principal Tracy Griffiths also wrote to parents on Sunday, saying a person with COVID-19 had attended the Year 9 physical education class on Wednesday, February 9, and had contact with a group of students while infectious. It was not clear if the person was a student or staff member. All of the affected schools remain open for students and staff who are not considered to be close contacts.