State (From state → To state) | Variable | Formula |
---|---|---|
Death | ||
  Death → Death | λi | =1 |
  Any state → Death | αi | = |
Status quo [no vaccination] | ||
Healthy | ||
  Healthy → Herpes zoster | βi | = |
  Healthy → Healthy | γi | = 1 - α i - β i |
Herpes zoster | ||
  Herpes Zoster → Death | δi | = |
  Herpes Zoster → PHN | ϵi | = |
  Herpes Zoster → Healthy after disease | ζi | = 1 - α i - δ i - ϵi |
PHN | ||
  PHN → PHN | ηi | = |
  PHN → Healthy after disease | θi | = 1 - α i - ηi |
Healthy after disease | ||
  Healthy after disease → Healthy after disease | κi | = |
  Healthy after disease → Herpes zoster | ιi | = 1 - α i - κ i |
Vaccine-Scenario [adapted transition probability due to vaccine efficacy (VE)] | ||
Healthy | ||
  Healthy → Herpes zoster | βi V | = |
VEi HZ | = | |
  Healthy → Healthy | γi V | = |
HZ | ||
  Herpes zoster → PHN | ϵi V | = |
VEi PHN | = | |
Healthy after disease | ||
  Healthy after Disease → Healthy after disease | κi V | = |
  Healthy after Disease → Herpes zoster | ιi V | = |