First off, my prayers are with your cousin, her baby and her family. I am finishing my 2nd semester of an ADN program and work in a nicu as an extern. I also had personal experience with preeclampsia.
Your new cousin at 24 weeks has a very long bumpy road ahead of him, one unfortunately many preemies do not survive. From what I have heard, read and seen, 24 weekers are still on the verge of viability. Alot will depend on the medical care available to him and on him. No child is like any other, and that begins long before they are born.
Again my prayers are with your family. Please keep us posted.
Tracy