A Via Rail employee who was recently working aboard intercity trains has tested positive for COVID-19, the national Canadian passenger rail service says.

In an email to Global News, a Via Rail spokeswoman said the employee was doing well and in self-isolation at home.

The company was still in the process of reaching out to passengers who may have come into contact with the employee, according to the spokeswoman.

“Although possible exposure remains minimal, we have made sure that all our employees and crews were notified as soon as we were made aware of the situation, and we will remain in contact with them through the following weeks,” Marie-Anna Murat, Via Rail’s senior director of corporate communications, wrote in an email to Global News.

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“We are in the process of contacting passengers who might have been in direct or indirect contact with our employee.”

Via Rail did not immediately confirm which route the employee was working on, however it had previously suspended service on all routes outside of Ontario, Quebec and Manitoba due to the risks posed by the global COVID-19 pandemic.

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It was not immediately clear how the employee had contracted the virus that causes COVID-19. But the diagnosis indicates that hundreds of people may have been unwittingly exposed to the virus through passengers or crew members who were potentially infected and able to spread the disease within their communities.