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Although genetic mutations in bacteria and viruses can lead to epidemi

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Location: India
Concentration: International Business, Operations
Schools: INSEAD Jan '19
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Re: Although genetic mutations in bacteria and viruses can lead to epidemi  [#permalink]

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New post 28 Mar 2019, 10:57
1
mallya12 wrote:
"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. "

Not able to understand clearly. Can someone explain the meaning


Alright, let me help you with this:

Poliomyelitis, for example, emerged as an epidemic in the United States in the twentieth century ( Poliomyelitis was already present in the U.S, but in the

20th century it emerged as an epidemic. Before that its presence may have been less severe)
; by then (In the 20th century), modern

sanitation was able to delay exposure to polio until adolescence or adulthood (modern sanitation was good and because of which polio exposure was delayed

till adulthood)
, at which time polio infection produced paralysis (This means , if polio virus infects you in adulthood, then this can lead to paralysis)

. Previously (Before this, when good sanitation facility was not there), infection had occurred during infancy(this polio

infection used to occur in the childhood)
, when it (the occurence of polio in childhood) typically provided lifelong immunity without

paralysis (means occurence of polio in childhood provided lifelong immunity against paralysis). Thus, the hygiene that helped prevent typhoid

epidemics indirectly fostered a paralytic polio epidemic. (Thus, modern hygiene that helped preventing typhoid, indirectly supported paralytic polio epidemic.

Because of more hygiene polio occurs only after adulthood and in adulthood polio infection produced paralysis. But this does not happen when polio occurs in childhood

because of non hygiene conditions)


Conclusion :

More hygiene , no typhoid , but polio infects in adulthood, and polio in adulthood leads to paralysis.

Less hygiene, typhoid, but polio infects in childhood, but no paralysis.


Hope this helps.
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Re: Although genetic mutations in bacteria and viruses can lead to epidemi  [#permalink]

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New post 29 Mar 2019, 05:52
AkshdeepS wrote:
mallya12 wrote:
"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. "

Not able to understand clearly. Can someone explain the meaning


Alright, let me help you with this:

Poliomyelitis, for example, emerged as an epidemic in the United States in the twentieth century ( Poliomyelitis was already present in the U.S, but in the

20th century it emerged as an epidemic. Before that its presence may have been less severe)
; by then (In the 20th century), modern

sanitation was able to delay exposure to polio until adolescence or adulthood (modern sanitation was good and because of which polio exposure was delayed

till adulthood)
, at which time polio infection produced paralysis (This means , if polio virus infects you in adulthood, then this can lead to paralysis)

. Previously (Before this, when good sanitation facility was not there), infection had occurred during infancy(this polio

infection used to occur in the childhood)
, when it (the occurence of polio in childhood) typically provided lifelong immunity without

paralysis (means occurence of polio in childhood provided lifelong immunity against paralysis). Thus, the hygiene that helped prevent typhoid

epidemics indirectly fostered a paralytic polio epidemic. (Thus, modern hygiene that helped preventing typhoid, indirectly supported paralytic polio epidemic.

Because of more hygiene polio occurs only after adulthood and in adulthood polio infection produced paralysis. But this does not happen when polio occurs in childhood

because of non hygiene conditions)


Conclusion :

More hygiene , no typhoid , but polio infects in adulthood, and polio in adulthood leads to paralysis.

Less hygiene, typhoid, but polio infects in childhood, but no paralysis.


Hope this helps.


Thanks a lot. Nicely Explained.
GMAT Club Bot
Re: Although genetic mutations in bacteria and viruses can lead to epidemi   [#permalink] 29 Mar 2019, 05:52

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