Folks the below question looks easy but took me for a ride. Can someone pls. clarify the way i understood from passage.
"Poliomyelitis, for example, emerged
as an epidemic in the United States in the twentieth
century; by then, modern sanitation was able to delay
exposure to polio until adolescence or adulthood, at
which time polio infection produced paralysis. Previously,
infection had occurred during infancy, when it
typically provided lifelong immunity without paralysis.
Thus, the hygiene that helped prevent typhoid epidemics
indirectly fostered a paralytic polio epidemic."
1. The passage suggests that a lack of modern sanitation would make which of the following most likely to occur?
A: An outbreak of Lyme disease
B: An outbreak of dengue hemorrhagic fever
C: An epidemic of typhoid
D: An epidemic of paralytic polio among infants
E: An epidemic of paralytic polio among adolescents and adults
I understood like below:
a. Poliomyelitis occurred in 20th century and modern sanitation helped to delay exposure to polio until adult hood or adolescence.
b.Without sanitation polio used to occur in infancy.
I didn't understand the last statement:
"Thus, the hygiene that helped prevent typhoid epidemics
indirectly fostered a paralytic polio epidemic."
What makes author to tell "Typhoid epidemics" -> "paralytic polio epidemics"? I didn't understand this and i selected D. The answer is C.
"Poliomyelitis, for example, emerged
as an epidemic in the United States in the twentieth
century; by then, modern sanitation was able to delay
exposure to polio until adolescence or adulthood, at
which time polio infection produced paralysis. Previously,
infection had occurred during infancy, when it
typically provided lifelong immunity without paralysis.
Thus, the hygiene that helped prevent typhoid epidemics
indirectly fostered a paralytic polio epidemic."
1. The passage suggests that a lack of modern sanitation would make which of the following most likely to occur?
A: An outbreak of Lyme disease
B: An outbreak of dengue hemorrhagic fever
C: An epidemic of typhoid
D: An epidemic of paralytic polio among infants
E: An epidemic of paralytic polio among adolescents and adults
I understood like below:
a. Poliomyelitis occurred in 20th century and modern sanitation helped to delay exposure to polio until adult hood or adolescence.
b.Without sanitation polio used to occur in infancy.
I didn't understand the last statement:
"Thus, the hygiene that helped prevent typhoid epidemics
indirectly fostered a paralytic polio epidemic."
What makes author to tell "Typhoid epidemics" -> "paralytic polio epidemics"? I didn't understand this and i selected D. The answer is C.
