With her a cold can be very serious. She has a weak cough. She can't cough up secretions like others normally could. It can be pretty dangerous.

She's got a deletion of a certain strand of DNA that produces survival motor neurons. Because she doesn't have that, she basically loses the connection from her nerves to her muscles and the muscles (then) atrophy.

They talk and it's been good for her. They're kind of going through some of the same things.

It can show itself later after the kids are older and are walking, and (they) slowly lose that ability. There's also an adult onset form. The earlier it manifests, the worse case it is.