Short answer
Hepatitis C is a blood-borne liver virus where testing is the decisive step: injection equipment sharing drives most transmission, sexual spread concentrates in higher-risk contexts, and modern curative therapy makes every diagnosis actionable.
No vaccine exists. So detection plus linkage to care carries the full prevention load that vaccination covers for hepatitis B.
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See Tests & Prices →Transmission with proportions intact
Shared needles and injection equipment dominate transmission.
Sexual transmission risk rises with HIV coinfection, multiple partners, sex with bleeding, and concurrent STIs. Real but secondary.
Perinatal transmission is uncommon.
Casual contact, food, water, and mosquitoes carry zero risk.
Prevention is behavioral plus harm reduction: sterile equipment discipline, condoms in risk contexts, and syringe-service engagement.
Blood-route principles are covered in HIV Transmission Through Blood: Key Facts.
Symptoms that rarely announce
Acute infection is usually silent; chronic infection smolders for decades before fatigue, jaundice, or cirrhosis complications appear.
Most diagnoses come from screening, not symptoms. Which is why one-time adult screening exists as a standing recommendation alongside risk-based repeats.
Testing that answers cleanly
Antibody screening with RNA confirmation distinguishes cleared from active infection. The two-step logic preventing both missed cases and false alarms.
Abnormal liver labs also trigger testing.
A reactive antibody alone never concludes; confirmation completes the question before any disclosure or treatment planning.
Treatment principles and after-cure vigilance
Specialists stage liver fibrosis first, then direct short oral curative courses that clear the virus in the large majority of adherent patients.
Cirrhotic patients continue liver-cancer surveillance indefinitely after cure; all cured patients keep liver-healthy habits with alcohol as the chief remaining threat.
Ongoing risk behavior gets harm reduction plus periodic retesting. Cure confers no immunity.
When to seek care
For one-time adult screening, with injection or sexual risk factors, for abnormal liver labs, and urgently for jaundice with confusion or bleeding.