Practice Test: Reading Comprehension - 2 | English Language for JAMB PDF Download

The fact that Edward Jenner was a country doctor was important in the discovery of the smallpox vaccine because he noticed that the disease seldom struck people who worked around cattle.
The passage states that Jenner, as a country doctor, noticed that smallpox rarely affected individuals in rural areas who worked with cattle. This observation led him to consider using cowpox to protect against smallpox. Therefore, option C is the correct answer.

Dr. Jenner was successful as the cowpox virus produces a mild infection in humans which is enough to produce active immunity.
The passage mentions that individuals who contracted cowpox, a milder infection compared to smallpox, recovered with only a pustule and a scar. This indicates that cowpox produced a mild infection in humans, which was sufficient to trigger active immunity. Therefore, option C is the correct answer.

Dr. Jenner made his experiment on a healthy boy who developed the signs of a pustule on his body when he was injected with the matter of cowpox.
The passage describes that Dr. Jenner made two shallow cuts on James Phillips' arm and inoculated them with matter from the cowpox sore. A pustule developed on the boy's arm, indicating that he exhibited the signs of a pustule after being injected with cowpox matter. Therefore, option C is the correct answer.

The passage is written in a narrative style.
The passage presents a story-like account of Edward Jenner's discovery of the smallpox vaccine, providing details of his observations, experiments, and the reactions of doctors and townspeople. Therefore, option A is the correct answer.