Social & Preventive Medicine Calculate positive predictive value of ELISA test for HIV with sensitivity 99%, specificity 99%. Prevalence of HIV in population is 5/1000. A 10 B 70 C 34 D 99 💡 Explanation Calculate positive predictive value of ELISA test for HIV with sensitivity 99%, specificity 99%. Prevalence of HIV in population is 5/1000. ✓ Correct Answer: C. 34