"She turned dark, dark red-purple and went limp in my arms, and her eyes got really big, and she just stopped making noise," said Rachel Chasse. "She just stopped doing any of this and I started screaming,".
The baby was taken by ambulance to Children's Hospital in Minneapolis, where she spent two weeks. At one point her oxygen levels plunged as low as 17 percent. A normal reading is around 100 percent.
The baby is much better now but when she gets agitated, there are still remnants of her pertussis cough.
Information from: Minnesota Public Radio News, http://www.mpr.org