Health officials say the 4 West and 4 East acute medicine units are affected. A total of 16 patients and one staff member have tested positive for the novel coronavirus.
The two units are closed to new admissions and non-essential visitors. The rest of the hospital remains open.
This is the third COVID-19 outbreak at the hospital since the start of the pandemic.
An outbreak last spring saw 16 people get infected, nine of whom died.
Another outbreak was declared in November.