Q196. Why do people who recover from certain diseases often become permanently immune to them?English — NUST Mock 2 — Question 196 of 200A. The pathogens become weaker over timeB. Their skin develops stronger barriersC. Their immune system creates memory cells that recognize the pathogenD. The inflammatory response becomes permanentPractice more English MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →