BC Teachers’ Federation is once again pushing for mandatory masks in classrooms, now that the federal government has identified airborne particles are a risk of COVID-19 transmission.President, Teri Mooring has been pushing for mandatory masks for everyone over the age of 10 any time they’re on school grounds since August.On Friday, Canadian health officials officially recognized that COVID-19 can spread through tiny droplets known as aerosols that can linger in the air.Mooring says with the new information, her case for mandatory masks in classrooms is stronger.