Wastage rate, Coverage rate, Dropout rate Calculation

1. Wastage Rate ,Coverage Rate,
Dropout Rate calculation
Prepared by
Binam Raj Shrestha
Master of Public Health(MPH)

2. How to calculate Vaccine wastage rate
• Vaccine usage rate (%)
• Number of immunized
[(#of usable doses + #of doses received ) at the beginning of the period]
-[ number of usable doses in stock at the end of the period ]
100
Vaccine wastage rate (%) = 100% -vaccine usage rate (%)

3. Estimating vaccine needs by target population
• Estimate by target population when you have reliable demographic data
• Total Doses for year =Target population × number of doses for antigen ×
coverage target × wastage multification factor (WMF)
example :-
• MR total doses= 0-11 month population × 2 ×[(target population coverage
of 1st dose )+ (target population coverage of 1st dose )] × wastage
multification factor (WMF

4. • Wastage multiplication factors(WMF) =
• 100
100-wastage rate for routine

5. Annual coverage rate for a vaccine dose:-
Number of infants who received dose during the last 12 months
Annual target population
100

6. • Annual target may be number of pregnant women or number of infants
<1 years old
• Eg. Pentavalent 1 can be calculated by using formula .

7. Dropout rate:-
Number of dropouts = Cumulative total for first dose in series –
cumulative total for last dose in series
Dropout rate = { total for first dose in series – cumulative total for last
dose in series } ×100

8. Thank you