In Two Communities of Similar Size and Age Structure (A

question 28

Multiple Choice

In two communities of similar size and age structure (A and B) , there were outbreaks of viral illnesses (virus A in community A, and virus B in community B) , both of which were traced back to a single source. Exposure to these viruses in each community confers permanent immunity. In community A, 200 susceptible people were exposed to an index case, 150 people were infected (not including the index case) , 75 people became ill, and 40 people died. In community B, pathogenicity was 40%, infectivity was 90%, and virulence was 60%. Which virus had the greatest infectivity?

• A) Virus A
• B) Virus B
• C) Both A and B were equal in infectivity.

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Definitions:

Resting State

A functional connectivity MRI (fMRI) technique that measures brain activity by detecting changes associated with blood flow when the brain is at rest.

Electrical Charge

A physical property that causes matter to experience a force when placed in an electromagnetic field, categorized as positive, negative, or neutral.

Sensory Neurons

Specialized neurons responsible for converting external stimuli from the environment into internal electrical impulses for the brain.

Sense Organs

Body parts responsible for receiving and processing sensory stimuli (eyes, ears, nose, skin, and tongue).