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Question
Diseases that are good candidates for eradication haveA) only a human reservoir.
B) no asymptomatic phase.
C) an environmental reservoir.
D) only a human reservoir and no asymptomatic phase.
Answer
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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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In 2003, the majority of AIDS deaths occurred in
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B) prevalence / mortality
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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.
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C) is spread through direct contact and has only a human reservoir.
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Influenza pandemics occur cyclically because
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B) can be virtually any pathogenic bacterium or virus.
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A) clonal anergy
B) clonal deletion
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Q:
An individual usually expresses ________ structurally distinct allele(s) that encode class I MHC proteins.
A) one
B) two
C) four
D) six