Any of the 650 students and 49 staff who does this can return to school on Monday.
"It's about health and safety."
Parents had responding well to the closure of classes, Mr Robinson said.
They can get proof of immunisation through their doctors or through signed Plunket books.
"The community has been absolutely wonderful. A number of parents have already been to their GP and dropped in photo copies of immunisation forms."
Meanwhile parents dropping children off at Levin Intermediate School this morning were told to take them home after Mid central Health advised the school to also close today, said acting principal Robbie Edwards.
"We are going through the process of notifying everyone ... we are working with the Ministry of Health and the Board of Trustees," he said.
Meanwhile, St Joseph's School administrator Nicki Stockman said they had been advised to contact parents of children who had been off school this week and ask about symptoms.
"Many children whose siblings are at Waiopehu and Levin Intermediate are off today as a precaution," she said. "I've had many phone calls from parents who are quite panicked about the situation ... we just have to weather the storm."