BIOLOGICAL CLASSIFICATION
VIRUSES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Flu viruses replicate more rapidly over time
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Flu 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: -Immunity from vaccination wanes over time so annual vaccination is recommended to protect against influenza.
Detailed explanation-2: -Flu viruses are constantly changing, so flu vaccines may be updated from one season to the next to protect against the viruses that research suggests will be common during the upcoming flu season. Your protection from a flu vaccine declines over time. Yearly vaccination is needed for the best protection.
Detailed explanation-3: -The influenza virus changes over time. This is because of two processes known as antigen drift and antigen shift that cause the virus to change its appearance, which means that from year-to-year, your immune system can no longer recognize and protect you from it.
Detailed explanation-4: -Influenza (flu) viruses are constantly changing. They can change in two different ways.
Detailed explanation-5: -In fact, some mutations could make the virus less infectious. Much of our knowledge of how viruses change to escape natural or vaccine-elicited immunity comes from observing the influenza virus and constantly updating influenza vaccines. Influenza viruses change in two main ways, antigenic drift and antigenic shift.