The mother of the child told the officer the baby, later identified as 6-week-old Luis Morales, had been sick.
A total of 16 people were taken to hospitals after a car blew through a stop sign and slammed into a CTA Bus.
The Chicago Fire Department was notified of the accident at 63rd and Throop streets at 11:18 a.m., according to Fire Media Affairs spokeswoman Meg Ahlheim.
Five ambulances were called to the accident which happened at 63rd and Throop Street about 11:40 a.m., according to police News Affairs.
One person was taken in serious to critical condition to Advocate Christ Medical Center in Oak Lawn, she said. The remaining 15 people were taken to Holy Cross and St. Bernard hospitals. Of those, three were in fair to serious condition and 12 were in good to fair condition, according to Ahlheim
CTA No.63 63rd Street buses were temporarily rerouted in both directions, but are now running on a normal schedule again, according to CTA's website.
This story is still developing. Please check back later for more details.