need help with hcv - rt-pcr

For years I have hep.c. and now after 7 years of taking all kind of naturals supplements : daily 8 oz of Colloidal Silver , milk thistle, alpha lipoic acid, selenium, olive leaf, licorice, dandelion, liv 52, essentiale forte N,(from Europe), oximatrine, b-complex, vit. E, Southerlandia OPC, I find out my blood work is in normal ranges : AST =20 and ALT =18
HCV RT-PCR, Hepatitis C Quantitation is < 43 IU/ml.
Lab Company they change the result from millions to a simple number.
Somebody can tell me the meaning of 43?

Thank you

Apure