Social & Preventive Medicine In the natural history of disease, all are true about the period of pathogenesis, EXCEPT: A Occurs after agent enters host body B Teiary prevention is possible at this stage C Screening does not affect the course of the phase D Sub-clinical phase can be present 💡 Explanation In the natural history of disease, all are true about the period of pathogenesis, EXCEPT: ✓ Correct Answer: C. Screening does not affect the course of the phase