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Question
The Spanish flu of 1918 was caused by an ________ influenza virus.A) H2N1
B) H5N1
C) H1N1
D) H2N2
Answer
This answer is hidden. It contains 1 characters.
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Which of the following statements about chlamydial infections is TRUE?
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Diseases can be controlled through immunization even if the percentage of the population that is immunized is less than 100% because
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Cholera is an example of a pandemic disease that
A) has multiple wild animal reservoirs and is thus difficult to eradicate.
B) spreads from a common source and could be controlled with adequate clean water and waste sanitation measures.
C) is spread through direct contact and has only a human reservoir.
D) has recently emerged due to overcrowding in urban centers.
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Influenza pandemics occur cyclically because
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B) new strains emerge due to reassortment between bird, swine, and human variants.
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The arrangement of Class II MHC proteins in pairs or trimers enhances their stability.
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