Vaccine Requirement Calculation
Vaccine requirement is calculated as follows:
- Total number of pregnant women/infants to be covered × Expected coverage × Number of doses of the vaccine ×Wastage multiplication factor ÷ No. of sessions to be held (or number of doses per vial).
- No. of pregnant women = Population × Birth rate.
- No. of infants = Population × Birth Rate × (1-IMR)
- For Monthly Requirement, divide annual dose by 12.
- If sessions are held fortnightly, the annual required dose is divided by 24 and if weekly, divide by 52.
- Expected vaccine coverage=100%=1
Vaccine
|
Dose
up to 1 year
|
Doses/Vial
|
Wastage
factor
|
TT
for pregnant women
|
2 doses per women
|
10 doses/vial
|
1.33
|
BCG
|
1 dose per child (at birth)
|
10 doses/vial
|
2
|
OPV
|
4 dose per child (0,1,2,3)
|
20 doses/vial
|
1.33
|
Pentavalent
|
3 dose per child (1,2,3)
|
10 doses/vial
|
1.33
|
DPT
|
3 dose per child (1,2,3)
|
10 doses/vial
|
1.33
|
Measles
|
1 dose per child (at 9 month)
|
5 doses/vial
|
2
|
- For example: If the population of an area is 50,000, the birth rate being 30/1000 and infant mortality rate is 100/1000 live births, the expected number of pregnant women and infants will be:No. of pregnant women = Population × BR = 50000*30/1000 = 1500No. of infants at 1 year of age = Population × BR × (1-IMR) = 1500*(1-100/1000) = 1500*0.9 = 1350Requirement of tetanus toxoid = 1500(pregnant woman) x 2(dose) x 1(100% coverage) x 1.33 (Wastage Factor) = 4000 doses (Annual Requirement).Monthly requirement = 4000/12 = 333 dosesNumber of vials =333/10 = 34 vials (because each vial contains 10 doses)
Comments
Post a Comment