impact_by_birth_year.RdThe birth year method accounts for the long-term impact accrued over the lifetime of a particular birth cohort. The duration of modelling needs to be appropriate to the pathogen of interest as in some cases, such as HepB, disease occurs later in life. For example if we model vaccination for birth cohorts born from 2000 to 2030 and model disease burden until 2100 we do not account for the vaccine impact for those born in 2030 once they are over 70 years old. The method also does not specifically account for the impact of vaccinating a cohort outside the cohort vaccinated (e.g. because of herd protection).
impact_by_birth_year(baseline_burden, focal_burden)Data frame of baseline burden data this needs to have columns country, burden_outcome, year, age, value
Data frame of focal burden data this needs to have columns country, burden_outcome, year, age, value
Vaccine impact by country and birth year for burden outcomes as a data frame with columns country, year, burden_outcome and impact