The TTC has reported nine of their workers have contracted the novel coronavirus.
Another 240 employees are in self-isolation.
The total includes at least three cases which had been previously reported— a Wheel Trans operator, a subway operator from the Wilson division and a mechanic at the Duncan Shop.
The other employees who tested positive for COVID-19 include two bus operators from the Mount Dennis garage, a station collector from the Danforth division, a streetcar operator from the Roncesvalles Division, a streetcar operator from Leslie Barns and a bus technician at the Old Davenport building.
The TTC says this list also includes those who had not returned to work after travelling and were already in self-isolation.