Interpandemic Period Phase 1
|
Low Risk of Human Case
|
Interpandemic Period Phase 2
|
Higher Risk of Human Case
|
Pandemic Alert Period Phase 3
|
No or Very Limited Human to Human Transmission
|
Pandemic Alert Period Phase 4
|
Evidence of Increased Human to Human Transmission
|
Pandemic Alert Period Phase 5
|
Evidence of Significant Human to Human Transmission
|
Pandemic Period Phase 6
|
Efficient and Sustained Human to Human Transmission
|
Post Pandemic
|
Deceleration or Recovery
|