What defines an outbreak?

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Multiple Choice

What defines an outbreak?

An outbreak means there are two or more people with a similar illness that are linked to a common exposure, and epidemiologic analysis supports that exposure as the source. This creates a cluster that is higher than what’s normally expected in the area or group over a defined period. A single case isn’t enough to call an outbreak because it can occur by chance and doesn’t show a meaningful pattern or shared source. Likewise, multiple unrelated illnesses with different exposures do not constitute an outbreak since there isn’t a common link or clustering to explain them.

An outbreak means there are two or more people with a similar illness that are linked to a common exposure, and epidemiologic analysis supports that exposure as the source. This creates a cluster that is higher than what’s normally expected in the area or group over a defined period. A single case isn’t enough to call an outbreak because it can occur by chance and doesn’t show a meaningful pattern or shared source. Likewise, multiple unrelated illnesses with different exposures do not constitute an outbreak since there isn’t a common link or clustering to explain them.

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