Social & Preventive Medicine Among the above characteristics, which are used to measure the ability of biological agents to induce clinically apparent illness? A 1 and 2 B 2 only C 3 only D 2 and 3 💡 Explanation Among the above characteristics, which are used to measure the ability of biological agents to induce clinically apparent illness? ✓ Correct Answer: A. 1 and 2