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HAN Message Types

      
Health Alert: provides vital, time-sensitive information for a specific incident or situation; warrants immediate action or attention by health officials, laboratorians, clinicians, and members of the public; and conveys the highest level of importance.
      
Health Advisory: provides important information for a specific incident or situation; contains recommendations or actionable items to be performed by public health officials, laboratorians, and/or clinicians; may not require immediate action.
      
Health Update: provides updated information regarding an incident or situation; unlikely to require immediate action.
      
Info Service: provides general public health information; unlikely to require immediate action.

pregnant woman with her hands on her stomachReady: Prepare. Plan. Stay Informed. Social Media at CDC Emergency

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