I want to know the answer to the following question:
Policymakers believe tax incentives, market commitments, and what third incentive will speed up vaccine development?
All the background I'm provided with is that "Among these, the Aeras Global TB Vaccine Foundation received a gift of more than $280 million (US) from the Bill and Melinda Gates Foundation to develop and license an improved vaccine against tuberculosis for use in high burden countries.". Is that enough to answer the question?
Answer: no