A presumptive case of coronavirus has hit Richmond Hill.

Yorkregion.com exclusively broke the case after a letter was leaked from MacKenzie Health about the incident earlier today.

Since then The Regional Municipality of York issued a press release explaining the details surrounding the case.

It's a travel-related incident in which the patient returned from Iran on Feb. 25 with a layover in Denmark. The 34-year-old woman developed symptoms prior to her return and was symptomatic on the flight, the release reads.

“On Wednesday, February 26, at approximately 3:55 p.m., the individual boarded GO Bus #40 at Toronto Pearson International Airport, Terminal 1, travelling eastbound sitting on the upper deck with a final destination arriving at the Richmond Hill Centre Terminal,” it continues.

“On Thursday, February 27, the individual was tested and assessed at MacKenzie Health Hospital in the City of Richmond Hill. The individual is currently in self-isolation recovering at home. As a result of the co-ordinated efforts of our health-care and public health system, the individual was quickly assessed and isolated.”

The region is asking that all individuals who travelled in the business class section of Qatar Airways flight QR 483 and QR 163, Air Canada flight AC 883 and on GO Bus #40 eastbound and sitting on the upper deck may have been exposed to this positive case of COVID-19 and are asked to contact York Region Public Health at 1-800-361-5653 Monday to Sunday between 8:30 a.m. to 8 p.m. for further assessment.

“York Region Public Health continues active followup of all close contacts of this positive case,” it added. “Individuals that were not in direct or close contact with the individual are not considered at risk of becoming infected.”

The region said the risk to York Region residents continues to remain low and there’s no evidence of community spread in York Region.

“York Region Public Health continues to collaborate with local hospitals, emergency services and other health agencies to ensure prompt reporting and follow up of all individuals who may require testing for COVID-19,” it reads. “Symptoms of COVID-19 include fever, cough and shortness of breath.”