Widow cursed and said "just get her here as fast as you can. Stark and banner are looking at her scans now and hopefully they will come up with something" 

Banner sighed and looked at the scans again, then his eyes widened and said "it's not a illness....wait a minute I've seen this before" he jumped up and ran over to the smart table, pulling up files and files on DNA information. "Tony, her DNA. It has the X gene....her body isn't failing, it's adapting. The world has changed in the past 70 years....so her body is reacting to those changes. I've run into other mutants where is sort of thing has happened"