Which of the Following Series Best Reflects What We Know

question 19

Multiple Choice

Which of the following series best reflects what we know about how the flu virus moves between species?

• A) An avian flu virus undergoes several mutations and rearrangements such that it is able to be transmitted to other birds and then to humans.
• B) The flu virus in a pig is mutated and replicated in alternate arrangements so that humans who eat the pig products can be infected.
• C) A flu virus from a human epidemic or pandemic infects birds; the birds replicate the virus differently and then pass it back to humans.
• D) An influenza virus gains new sequences of DNA from another virus, such as a herpesvirus; this enables it to be transmitted to a human host.
• E) An animal such as a pig is infected with more than one virus, genetic recombination occurs, the new virus mutates and is passed to a new species such as a bird, and the virus mutates and can be transmitted to humans.

---

Definitions:

Concurrent Validity

Refers to the extent to which the results of a particular test or measurement correspond to those of a previously established measurement for the same construct.

Error Of Measurement

The difference between a measured value and the true value due to limitations in measurement accuracy or technique.

Reliability

The extent to which a testing device delivers uniform and steady outcomes over time.

Correlation Coefficient

A statistical measure that indicates the extent to which two or more variables fluctuate together, ranging from -1 to 1.