Some Shell Canada employees in Sarnia are being asked to monitor their health after a contractor who had worked at the plant tested positive for COVID-19.

In an update sent to employees, officials said in late in the day March 23, the company was notified of that a contractor worker who was onsite between March 11 and 13 had tested positive for COVID-19. It’s not clear when that occurred. The worker didn’t have any symptoms at the time, the update continues.

Officials told Shell employees working close to the contractor’s work about positive test the same day. They’ve been asked to self-monitor for symptoms until March 27.

There have been no confirmed cases of the novel coronavirus in Lambton County, however Medical Officer of Health, Dr. Sudit Ranade, says considering Michigan, Chatham-Kent and London all have cases, public health officials are assuming it is in the region.

Ranade says the best way to reduce the risk of getting the virus is by self isolating at home and when you do need to go out for essentials to keep two-meters between yourself and other people. Public health officials also urge you to sneeze and cough into your elbow or a tissue and to wash your hands frequently.