Dispersal of biological agents is a real and psychological terrorist threat.When the following organisms are compared,which is classified by the CDC as Category A: Greatest Threat?

Question

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Category A organisms are considered the greatest threat because they can be transmitted easily from person to person and can cause high mortality with a potential for major public health impact.Of the organisms listed here,only anthrax (Bacillus anthracis)is considered a Category A organism.
Category B organisms are moderately easy to disseminate and cause moderate morbidity and low mortality.They are considered high-risk organisms.Ricin toxin and Salmonella are classified as Category B.Hantavirus is considered a Category C organism or a pathogen that could be engineered for mass dissemination.

Dispersal of Biological Agents Is a Real and Psychological Terrorist