In 2009, a Flu Pandemic Was Believed to Have Originated

question 21

Multiple Choice

In 2009, a flu pandemic was believed to have originated when viral transmission occurred from pig to human, thereby earning the designation "swine flu." Although pigs are thought to have been the host for the 2009 virus, sequences from bird, pig, and human viruses were all found within this newly identified virus. What is the most likely explanation for the presence of sequences from bird, pig, and human viruses?

• A) The virus was descended from a common ancestor of bird, pig, and human flu viruses.
• B) The infected individuals happened to be infected with all three virus types.
• C) The RNA of related viruses can reassort during viral assembly resulting in new genetic combinations.
• D) The human was likely infected with various bacterial strains that contained all three RNA viruses.

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Definitions:

Expected Residual Value

The anticipated value of an asset at the end of its useful life, important in calculating depreciation and lease payments.

Lease Rate

The amount of money paid over a specified time period for the use of an asset or property, typically expressed as an annual amount or percentage.

Operating Leases

Provides for both financing and maintenance. Generally, the operating lease contract is written for a period considerably shorter than the expected life of the leased equipment and contains a cancellation clause; sometimes called a service lease.

Maintenance

Maintenance involves the actions taken to keep equipment, buildings, or software operating efficiently or to repair it to optimal functioning state.