She worked with Juliet in the Infirmary and later informed Juliet that Kate was there to donate blood for Ben because she was a universal donor. Template:Crossref
She may have been killed along with other members of the DHARMA Initiative in the Purge, or she may have been evacuated off the island sometime between 1977 and The Purge.
In the casting call Debra was described as "late 20s to 30s. Any ethnicity. Intelligent field nurse. Can quickly respond to new emergencies. Strong, does not shrink from overwhelming situations."