Since the first confirmed case of measles was diagnosed in a shelter resident on Friday, approximately 900 residents have been vaccinated, officials said. 

The city of Chicago has a new public health commissioner filling this high-profile role after the ousting of Dr. Allison Arwady in August. Dr. Olusimbo “Simbo” Ige is the first Black woman to lead the Chicago Department of Public Health on a permanent basis.

Dr. Olusimbo “Simbo” Ige will now be asked to deliver on Mayor Brandon Johnson’s vision of public health for Chicago — while coping with the continuing pandemic.