Scelta multipla
Which of the following is most directly responsible for the entry of the influenza virus into the cell?
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30. Microbial Infections - Respiratory System
Influenza
Scelta multipla
Which of the following types of influenza are the most common and cause seasonal epidemics?
i. Influenza A.
ii. Influenza B.
iii. Influenza C.
A
I & II.
B
I & III.
C
II & III.
D
I, II, & III.
Guida verificata passo dopo passo1
Step 1: Understand the classification of influenza viruses. Influenza viruses are categorized into types A, B, and C based on their core proteins and genetic makeup.
Step 2: Recognize the epidemiological significance of each type. Influenza A viruses are known for causing widespread seasonal epidemics and pandemics due to their ability to undergo antigenic shift and drift.
Step 3: Consider Influenza B viruses, which also contribute to seasonal epidemics but generally cause less severe outbreaks compared to Influenza A. They mainly infect humans and have less genetic variability.
Step 4: Note that Influenza C viruses typically cause mild respiratory illness and are not associated with seasonal epidemics or widespread outbreaks.
Step 5: Conclude that the types most commonly responsible for seasonal epidemics are Influenza A and Influenza B, while Influenza C is not a major cause of such epidemics.
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