Zombie movie

I’m trying to find a zombie film I watched a couple years back, i don’t know the name but it was about a little black girl with a Afro who got separated from her mother as her mother went on a train to safety and she couldn’t get only , she survives because a army guy helps her, she’s reunited with her mother at the end and her mothers a doctor and pretends her daughter is as they save doctors even if infected in the movie, at the end the girl wakes up a zombie in a hospital bed with a mask on. I’ve tried searching and nothing shows please help!