Which of the following routes of transmission is most responsible for the spread of hepatitis...

Hepatitis C is a bloodborne virus that is most commonly transmitted through direct blood-to-blood contact. Sharing needles allows contaminated blood to enter another person’s bloodstream, making it the primary mode of transmission. Hepatitis C is not spread through casual contact such as touching skin, coughing, or sharing drinks. Understanding transmission routes is essential for infection prevention and public health, and the NEX Science exam frequently emphasizes distinguishing between airborne, contact, and bloodborne diseases. Because hepatitis C spreads primarily through shared needles, option D is correct.

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