Immunocompromised individuals can experience delayed seroconversion of HCV antibodies. I’m personally unfamiliar with Chron’s; the rate of percutaneous needlestick transmission for HCV among health care workers is low, however:
Needle stick Risk for Occupational Transmission of HCV
HCV is not transmitted efficiently through occupational exposures to blood. The average incidence of anti-HCV seroconversion after accidental percutaneous exposure from an HCV-positive source is 1.8% (range: 0%--7%) (73--76), with one study indicating that transmission occurred only from hollow-bore needles compared with other sharps (75).
http://www.cdc.gov/mmwr/preview/mmwrhtml/rr5011a1.htm
--Bill
No, at 7 1/2 months you would test positive for antibodies regardless of Crohn's or the medication you're taking if the virus was present.
Trinity