What does it means when your paper file is showing hep c virus ab 0.1 s/ co ratio 0.0 - 0.9 and what can you about it?

Probably negative: What i understand from your question is that normal value of hepatitis C antibody is between 0.0 to 0.9. If your level is 0.1, which meaning it is negative. This indicates you have never been exposed to hepatitis C virus.

Likely Negative: Recommend seeing your physician to do additional tests that shows presence or absence of hepatitis virus in the blood. (hcv RNA quantitation).

Incomplete info: There is insufficient information to give an informed answer. You physician who has the full report should be contacted for explanation.