NURSING EXAM QUESTIONS
MICROBIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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viruses replicate more rapidly over time
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viruses can mutate from year to year
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vaccines are absorbed by the body after a year
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vaccines get stronger over time
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Detailed explanation-1: -Because new strains appear frequently, the seasonal flu vaccine usually changes each year, as scientists determine how the virus has mutated and spread.
Detailed explanation-2: -Antigenic Drift As a virus replicates, its genes undergo random “copying errors” (i.e. genetic mutations). Over time, these genetic copying errors can, among other changes to the virus, lead to alterations in the virus’ surface proteins or antigens.
Detailed explanation-3: -Influenza (flu) viruses are constantly changing. They can change in two different ways.
Detailed explanation-4: -It’s because new strains of the virus are constantly appearing and evolving, so the vaccine must change along with them. Located around the world are influenza surveillance centers that annually monitor the most common strains, collecting data and identifying new and evolving strains.