Vaccine Requirement Calculation in Primary Healthcare Centers
Learn how to calculate the vaccine requirement in primary healthcare centers to ensure a steady supply for immunization programs. Understand the factors like target population, number of doses, immunization coverage, and wastage to estimate the annual vaccine needs accurately.
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Presentation Transcript
CALCULATING VACCINE REQUIREMENT IN PHC
How to determine vaccine needs, so that immunization programme will not be interrupted
VACCINE MANAGEMENT Involves estimating number of vaccine doses needed for particular population over a stated supply period to run an efficient and effective immunization session Depend on reliable planning and monitoring
HOW TO CALCULATE VACCINE REQUIREMENT AT PHC 1. Target population (pt) 2. Number of doses in schedule (dn) 3. Target immunization coverage (ic) expressed as decimal number (not in percentage) 4. Wastage factor (wf)
TARGET POPULATION Number of people who are eligible for vaccination with a particular vaccine (pt) BCG vaccine pt is all live births. For all other vaccines pt is all surviving infants
NUMBER OF DOSES IN SCHEDULE (DN) Vaccine Schedule by age Number of doses in schedule (dn) 1 3 4 BCG Pentavalent Polio (OPV) At birth At 6,10, 14 weeks At birth, 6,10, 14 weeks PCV 10 At 6,10, 14 weeks 3 Measles Tetanus toxoid At 9 and 16 months Childbearing age ideally all women should receive 5 doses of TT 2 at least 2
TARGET IMMUNIZATION COVERAGE (IC) The percentage of eligible population that has been agreed as objective for immunization with each vaccine, performance of Health Post will be measured against target
WASTAGE FACTOR (WF) 1. For liquid vaccine supplied in single or two doses vials (Pentavalent vaccine or PCV 10) wastage rate is 5% 2. For OPV wastage rate 10% 3. For reconstituted vaccines- 50% for BCG vaccine and 25% for measles vaccine. 4. Wastage factor (wf)= 100 /100-% wastage rate)
Annual vaccine need= pt X dn X ic X wf 1. Target population (pt) 2. Number of doses in schedule (dn) 3. Target immunization coverage (ic) 4. Wastage factor (wf)
Calculate the annual vaccine needs for Pentavalent vaccine for a target population of 200 surviving infants, three doses of this vaccine per child needed for full immunization. Target coverage rate 90% and wastage factor 1.33
CALCULATING ANNUAL VACCINE NEEDS FROM PREVIOUS CONSUMPTION Annual vaccine needs (in doses)=(i+r) (f+l) 1. Initial vaccine stock at the beginning period (i) 2. Vaccines received during period (r) 3. Stock remaining at the end of period (f) 4. Lost, destroyed or expired doses (l)
Calculate annual vaccine needs (in doses) for Pentavalent vaccine in which initial stock at beginning of year was 250 doses and received during year was 1250 doses, at the end of year were 500 doses remaining in stock, lost during year was 125 doses.
