Interactive pattern between Z(herpes zoster) and V(varicella) over the time axis.

<p>Interactive pattern between Z(herpes zoster) and V(varicella) over the time axis.</p

Incidence rate ratios of varicella for annual trend, and by season, sex, varicella, temperature and sunny hours, before and after vaccination.

<p>Incidence rate ratios of varicella for annual trend, and by season, sex, varicella, temperature and sunny hours, before and after vaccination.</p

Seasonality of herpes zoster and varicella: annual trend of monthly incident cases of herpes zoster and varicella in 2000–2009.

<p>Seasonality of herpes zoster and varicella: annual trend of monthly incident cases of herpes zoster and varicella in 2000–2009.</p

Incidence rate ratios of herpes zoster for annual trend, and by season, sex, varicella, temperature and sunny hours, before and after vaccination.

<p>Incidence rate ratios of herpes zoster for annual trend, and by season, sex, varicella, temperature and sunny hours, before and after vaccination.</p

Annual incidence rates of varicella and herpes zoster from 2000 to 2009.

<p>Annual incidence rates of varicella and herpes zoster from 2000 to 2009.</p

Seasonality of herpes zoster and varicella: monthly average incident cases from 2000 to 2009.

<p>Seasonality of herpes zoster and varicella: monthly average incident cases from 2000 to 2009.</p

Study event rates among the elderly ≥65 years old over the study period from 1999–2000 to 2008–2009 influenza seasons in Taiwan.

<p>Panel A and Panel B represents pneumonia and influenza (P&I)-related outpatient visit and hospitalization rates. The actual observed events (Blue-shaded area), model-predicted events (Red line) and age-standardized events (black dashed line) are expressed as monthly rates per 100. Panel C represents viral surveillance data expressed as the weekly percentage of tests positive for influenza viruses. Horizontal line sets the cutoff of isolation rate ≥10% and the influenza epidemic months are shaded in blue. Panel D represents the annual trivalent influenza vaccine (TIV) vaccination rate among the elderly in percentage. No free TIV vaccination was provided for the 5–19 age group during 1999,9–2007,8.</p

Predicted propensity scores between TIV-receiving and TIV non-receiving elderly over the study period from 1999–2000 to 2008–2009 influenza seasons in Taiwan.

<p>Predicted propensity scores between TIV-receiving and TIV non-receiving elderly over the study period from 1999–2000 to 2008–2009 influenza seasons in Taiwan.</p

Primary analysis results of two fitted multivariate Poisson regression models for pneumonia/influenza-associated outpatient visits and hospitalization among the elderly from Sep., 1999 to Aug., 2009.

<p>*p<0.05;</p><p>**p<0.001.</p

Age-specific event rates over the study period from 1999–2000 to 2008–2009 influenza seasons in Taiwan.

<p>Panel A and Panel B represents pneumonia and influenza (P&I)-related outpatient visit and hospitalization rates. Panel C represents the annual trivalent influenza vaccine (TIV) vaccination rate in percentage.</p