Cumulative risks are risks that increase with each added risk.
Yes.We do include vaccinated population from population at risk calculating cumulative incidence.
example for cumulative incidence(Risk)...... Number of new cases/Population at risk 28 patient in two years/1000 person at risk which means 2.8% the IR for the same example 14 patient / 1 year
cumulative percentage = (cumulative frequency ÷ n) x 100
No, cumulative is not a compound word.