COVID-19 cases on Thursday and three more outbreaks in the city involving a retirement home, a workplace and a school.The new cases represent the highest single-day number the city has reported amid the pandemic.During an update from public health on Thursday, Hamilton’s medical officer of health said the city’s recent “fluctuating” numbers are not “worsening,” however they are also not getting any better.“They’re just fluctuating slightly around that level of about 50 per 100,000,” said Dr.