new vaccine supply and financing: a case study of combination vaccines in developing countries viral...
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New Vaccine Supply and Financing: A Case Study of Combination
Vaccines in Developing Countries
Viral Hepatitis Prevention Board Meeting
Malta
October 22-23, 2001
Global status of countries using HepB vaccine in theirnational immunization system, 2001
Yes No
August 2001
The boundaries and names shown and the designations used on this map do not imply the expression of any opinion whatsoever on the part of the World Health Organization concerning the legal status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries. Dotted lines on maps represent approximate border lines for which there may not yet be full agreement.
Routine HepB implementation status
HepB Combination vaccines: A sample of current developing country users
• WPRO - Started with monovalent, especially with birth dose, now some adopters with quadrivalent (DTP-hepB)
• PAHO - Originally not very interested, now adopting combos (quad or pentavalent)
• AFRO - Two original countries started with monovalent. One now shifting with GAVI, as is most of AFRO, to quadrivalent (DTP-HepB) or pentavalent (DTP-HepB-Hib)
GoalThe goal of public sector is to ensure that high
quality vaccines are developed in adequate capacity and supplied at reasonable prices to meet the priority needs of developing countries.
Current HypothesisThe expanded use of combination vaccines in
developing countries will have a significant impact on global supply of the individual antigens and programme flexibility.
Why this study?This study should provide some clarity regarding
the following issues of combination vaccines: – What are the regulatory, supply and
programmatic issues impacting availability and use of these vaccines?
– What are the implications of these issues?– What can public sector do to maximize the
opportunity to introduce new antigens via combination vaccines in developing countries while finding the necessary balance for regulation, supply and acceptance?
Combination Vaccines
Benefits• Fewer number of
injections • Fewer syringes used -
good for injection safety and less waste generation
• Less thiomersal exposure due to fewer total injections
• May make the introduction of a new antigen transparent
Drawbacks• Can limit programme
flexibility• Present regulatory issues• Impact on supply of
traditional vaccines • One supplier for multiple
antigens (supply and price) though that will soon change
• Can be more expensive than monovalent options
• Need for cold chain expansion with shift to lower dose.
Vaccines Pre-qualified for Sale by UN Agencies by Manufacturer
DC/EE is Developing Country or Emerging Economy manufacturers all in purple.Industrial country manufacturers and their products are in blue.All Hep B in this graph is recombinant. There is also one pre-qualified plasma derived Hep B vaccine manufacturer.
DTwP HepB hib DTwP-HepB DTwP-HepB + hib (lyo)measles MR MMRAventis PasteurBiken, J apanBio Farma, IndonesiaChiron, Germany & ItalyCSL, AustraliaGlaxo Smith Kline, BelgiumGreenCross Vaccine, KoreaLucky Goldstar, KoreaMerck and Co.Serum Institute of IndiaSwiss Serum Institute3 DC/EE in process
Regulation and Licensing Status
of Combination Vaccines
Base vaccine Specific Combination Licensing Status
DTwP DTwP-hep B Europe primarily for developing country marketDTwP-Hib Europe primarily for developing country marketDTwP-hep B-Hib Europe primarily for developing country market
DTaP DTaP-hep B Europe and U.S.DTaP-Hib EuropeDTaP-hep B-Hib EuropeDTaP-hep B-Hib-IPV Europe
Measles MMR Europe and U.S. and many countriesMR Europe and U.S. and many countriesMM Europe, U.S., Russia and many countries
Issues in Regulation of Combination Vaccines
• Clinical studies• Interference between antigens in
combinations• Adjuvants and their ability to change the
immunological characteristics and stability • Minimum potency levels must be
determined• New reference materials need developing• Data needed for adverse events analysis
Licensing & Oversight of DTwP based Vaccines: EMEA
• EMEA licenses only products that have a market in Europe: must be re-licensed after five years.
• Recently re-licensed GSK’s combinations. • Spain is now importing significant quantities of
DTwP-Hep B - hib combination vaccine for use which will ease concerns that DTwP based combinations are not used in Europe.
• EC undertakes at WHO request, review of product file, data and facility. EMEA would not license the product, but would delegate authority to the relevant NRA all remaining regulatory activities.
DTwP based combination vaccines
• Supply update
• Antigen allocation: production and capacity
• Market characteristics, their effect on demand and resulting predictions
77% of UNICEF’s DTwP supply comes from developing country sources and the amount
offered is narrowly meeting demand. As DTwP is siphoned for combination, the supply of DTwP
for other programmes could be jeopardized.
Source: Unicef Supply Division
DTwP
0
100
200
300
400
500
600
Year
Mil
lio
ns
of
Do
se
s
Availability
Demand
Availability of Hep B
• Meanwhile the amount of single antigen Hep B vaccine is about to reach an all time high with the addition of another prequalified Hep B manufacturer to the list, and another likely to follow soon.
• The only manufacturer making plasma derived is also shifting to recombinant Hep B vaccine production
Manufacturer Response to Forecasting Demand
Source: GAVI’s Financing Task Force, Forecasting Subgroup and UNICEF Supply Division
0
20
40
60
80
100
120
140
DTwP-hep B-Hib DTwP-hep B
Estimated demand 2001-2003 Response to UNICEF RFP
Antigen Re-allocation: Review of One Producer's Response
0
20
40
60
80
100
120
140
DTwP-hep B-Hib DTwP-hep B
# o
f d
oses (
in m
illio
ns)
Estimated demand 2001-2003
Response to UNICEF RFP
Effect of antigen reallocation
Market Characteristics, Determining Acceptance and
PredictionsMarket Characteristics Africa GAVI market Latin America
Financial condition Poor middle income
General programmaticcondition
Weak strong
Programmatic flexibility Limited flexibilityCan choose, more easily, to be
flexible
Ability to make decision tochange usage
Generally the regulatory body isnot qualified to make alternate
usage decisionsRegulatory body is qualified to make
usage decisionsLocal vaccine production of
DTwP, hep B, or Hib None some
Hib disease burdenHigh but other more pressing
problems of concernHigh burden with several studies
already performed
hep B disease burden Very high Lower (priority for Hib above hep B)
PredictionHigh uptake of DTwP-hep B;Not likely to buy anything forwhich there is not a great need.
High uptake of DTwP-Hib;Probably willing to buy combos with
inexpensive extras (like hep B).
Vaccine Costs and Premiumsfor Global Fund purchase for
GAVIVaccine Vial size Cost of vaccine per
dose in 2001 orsoonest available
Premium from 2001-03and expected trend
DTwP 10 dose 0.078 N/Ahep B 10 dose 0.32 N/A
Hib (liq) 1 dose 2.70 N/ADTwP- hep B 10 dose 1.10 + 0.70 to
+ 0.50 decreasingDTwP - Hib (liq) 1 dose 3.00
from 20020
steady DTwP-hep B-Hib (liq) 2 dose 3.50 + 26 to
- 0.14 decreasing
Determining Acceptance of Combination Vaccines
If the antigens in the combination are wanted, the combination has added value. If the combination is affordable, the country is willing to pay more to have the vaccines in combination form. The premium, if reasonable, is worth the benefit (ex. DTwP-HepB).
However, the simple availability of a combination vaccine does not automatically make the product of value to the programme (ex. DTwP-HepB-hib in Africa or MMR in Japan).
WHO’s Strategic Advisory Group of Experts
Recommendations
WHO review the possible combination vaccines and the implications on supply, regulation, presentation, and price and assist countries to assess appropriateness of each combination for their national immunization programmes; consideration of the role of developing country production and the implications of sole source suppliers should be part of this process;
WHO, in working with partners, especially vaccine manufacturers, provide accurate demand forecasting of the various combination vaccines (determined by national immunization programme managers to be beneficial, programmatically feasible, financially sustainable and worth introducing if funding were available).
WHO place priority on the continued action to address and monitor progress with regard to the licensing of vaccines in industrialized countries for use in developing countries.