In the city, we assumed that there are two hospitals, with one being designated as a flu treatment and isolation centre during a pandemic outbreak. Patients with flu-like symptoms will be directed to that hospital for diagnosis and treatment. The other hospital will handle other non-influenza-like illnesses (ONILIs) which include cases such as bacterial infections and accidental injuries. Normally, without a designated flu hospital, these ONILI cases will present themselves as susceptible targets for infection within the hospital. However, this scenario is not considered in depth within our model.