The WHO Global Vaccine Market Report 2023 provides a comprehensive overview of the global vaccine market, including insights on market concentration, distribution inequities, the impact of COVID-19, challenges, and future projections. Key highlights include that the top four manufacturers control 90% of the market and that only 20% of COVID-19 vaccines were distributed to low-income countries. The report emphasizes the need for investment in pandemic preparedness and loans for low-income nations to improve vaccine access.