Although we don't offer medical advice here per our Terms of Service, generally speaking, Hep A is the concern for food service settings, not Hep C. Here's a link to the CDC page on hepatitis:
http://www.cdc.gov/ncidod/diseases/hepatitis/index.htm
As a side note though, the thought of a finger-licking, Bandaid-shirking cook is kind of gross. Hopefully if they ate her food before, now at least they won't.