Five mild adult cases of Influenza A, otherwise known as H1N1, have been detected in patients at North York General Hospital.
The hospital said all cases showed symptoms of nasal congestion, cough, fever and malaise. All patients are currently recovering.
The patients and the unit where they are located are in isolation to prevent any further spread.
The hospital is also working with Toronto Public Health to enforce precautions and control measures.
There have been no further spread of Influenza A on the unit since January 7.