The Windsor-Essex County Health Unit is warning Transit Windsor riders they may have been exposed to COVID-19.
It has issued an exposure alert for three routes, Transway 1C, Dougall 6, and Crosstown 2.
There's no set location.
The dates of exposure are May 3 between 9:45 a.m. and 5:30 p.m., and May 3 between 5:30 p.m. and 1:30 a.m., May 4, 6, 7 and 8, between 9:45 a.m. and 5:30 p.m.