A child presents to the ER with his mother. She states that…

A child presents to the ER with his mother. She states that he has a runny nose (coryza), a cough, and it looks like he has pink eye. Due to recent outbreaks of vaccine-preventable diseases in the community, you know that this child is highly contagious. You immediately place the child in a negative pressure room on airborne precautions because you are suspicious that the child has what illness?