WHO/CDC Pandemic Mitigation Interventions
The World Health Organization and the U.S. Government have established response phases/stages for influenza pandemic. Central District Health Department used these phases/stages to determine alert levels for local response. Central District Health Department also identified a simple timeline and interventions that may be used to slow the spread of the influenza virus. Link to CDHD Mitigation Intervention Table.
| World Health Organization (WHO) Phases | Federal Government Response Stages | Central District Health Department Response Levels | Inter-Pandemic Period |
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|---|---|---|---|---|---|
1 |
No new influenza virus sybtypes have been detected in humans. An influenza subtype that has caused a human infection may be present in animals. If present in animals, the risk of human disease is considered to be low. | 0 |
New domestic animal outbreak in at-risk country. | 1 |
Maintain, surveilance, continuing education, and partnership building. Influenza pandemic education and public messages will be coordinated for delivery. |
2 |
No new influenza virus subtypes have been detected in humans. However, a circulating animal influenza subtype poses a substantial risk of human disease. | ||||
Pandemic Alert Period |
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3 |
Human infection(s) with a new subtype, but no human-to-human spread, or at most rare instances of spread to a close contact. | 0 |
New domestic animal outbreak in at-risk country. | 2 |
Requires active surveillance actions, internal and external communication, with health care facilities and other |
4 |
Small cluster(s) with limited human-to-human transmission but spread is highly localized, suggesting that the virus is not well adapted to humans. | 1 |
Suspected human outbreak cases. | public health agencies. Preparatory actions for the possibility of mas care and mass fatality should be taken. | |
5 |
Larger cluster(s) but human-to-human spread still localized, suggesting that the virus is becoming increasingly better adapted to humans but may not yet be fully transmissable. | 2 |
Confirmed human outbreak overseas. | Review, and update any necessary memorandums of understanding. Review Continuity of Operations Plan (COOP). | |
Pandemic Period |
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6 |
Pandemic phase: increased and sustained transmission in general population. | 3 |
Widespread human outbreaks in multiple locations overseas. | 3 |
Required when the US declares a stage 4 influenza pandemic. The CDHD COOP will be |
4 |
First human case in North America. | be activated. Long-term response, 18- | 5 |
Spread throughout the United States. | 24 months, will be required. |
6 |
Recovery and preparation for subsequesnt waves. | ||||
* Follow recommendations of local, state, and federal public health officials.
** Early suspected or confirmed cases may be issued orders of isolation by local Board of Health or their designee.
