This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
HIV seroconversion ratio after needle-stick is? 
Select and explain. 
A. Less than 1 in 3000, B. Lessthan 1 in 300, C. Less than 3 in 1000, D. Less than 3 in 100
C: Less than 3 in 1000
Answer: C: Less than 3 in 1000 
Explanation: Less than 3 in 1000 REF: The ICU book Paul L. Marino, Kenneth M. Sutin - Page 55 A single needle-stick injury with blood from an HIV-infected patient carries an average 0.3% (3 in 1000) risk of HIV seroconversion