LONDON, ONT. -- 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 or closures. The Middlesex-London Health Unit (MLHU) Medical Officer of Health Dr. Chris Mackie says, "We really have not seen a lot of spread in schools here...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."