Transcript for 4-year-old loses vision in fight with the flu
We are back now with a new warning about the flu after a 4-year-old Iowa girl nearly died from the virus, lost her vision. The b-strain hitting children especially hard. Eva pilgrim joins us now on this. Good morning, Eva. Reporter: This is a scary story for parents. This gill girl was perfectly healthy until she got the flu. This mother's urgent warning about the flu after her 4-year-old daughter was left unable to see. Here, listen. Reporter: Amanda Phillips says her daughter jade who did not get a flu shot started showing signs of being sick a few days before Christmas. She was just, you know, a normal bug, the flu for a few days and then all of a sudden, you know, five days later, she was unresponsive. Reporter: When her parents found jade unresponsive on Christmas eve, she was rushed to the hospital, and she was diagnosed with flunz B. There's an initial infection, and the body overcompensates and sometimes instead of fighting off the infection, it starts fighting itself, and it can fight the brain. Reporter: After nearly two weeks -- Hey, jade. Reporter: -- Jade, finally opened her eyes, but Phillips says she noticed something wasn't right. She couldn't focus. You would hand her something or try to, you know, give her a toy and she wouldn't grab it. Reporter: Her mom says she's lost her vision and is not sure she will ever get it back. Still, she and the doctors remain hopeful. When it happens in younger children, they can recover significantly, and we definitely have hope in this case there will be significant recovery, but there can be permanent outcomes from this process. Reporter: Now back at home, jade is making progress, but still has a long road ahead. And jade didn't get a flu shot last March, and she thought that meant she was good for the whole year. She didn't realize she needed a new vaccine for the 2019/2020 season. Good reminder for parents. Even if you get the flu shot, there are no guarantee, but there are some additional benefits, aren't there? It helps keep these extreme complications from happening. It helps you, and they theorize it could help you fight the flu.
This transcript has been automatically generated and may not be 100% accurate.