Why does the COVAX facility fail to bridge the 'immunization gap'?

In April 2020, the World Health Organization launched a COVID-19 Vaccines Global Access (COVAX) Facility, a groundbreaking public health policy, to work "for global equitable access to COVID-19 vaccines". Although innovative, it fails to bridge the 'immunization gap' between high-income and low-income countries. The main reasons for this include: (1) failure to provide adequate incentives for self-financing countries to participate; (2) failure to design the vaccine allocation mechanism to reflect to national political considerations along with the perspective of medical ethics; (3) lack independent financing and power to enforce the policies globally. Constraints have limited the effectiveness of COVAX to date but transforming it into an information center to provide information on vaccine supply and demand, disseminate vaccine knowledge, and publish requests for help can accelerate progress.