LONDON, ONT. -- School and health officials say classrooms remain safe, even with active COVID-19 cases in 30 London-area schools. According to the Thames Valley District School Board (TVDSB) website, there are currently 26 schools in the region with at least one or more active COVID-19 cases, but only a small fraction have led to outbreaks. Middlesex-London Health Unit (MLHU) Medical Officer of Health Dr. Chris Mackie says the region has not really seen much spread in schools. "The vast majority of cases diagnosed in school were acquired at home. We've seen very little transmission within schools, really only a handful of cases among the tens of thousands of students that have been in school for the last two months, so schools are not a place of high transmission in this area."