Yet despite taxpayer funding of these efforts, Azar speculated that vaccines might not be affordable to all and dismissed the idea of using price supports to ensure that poor people would have access to the vaccine. Without price controls, poor countries are unlikely to be able to afford or access enough vaccines to protect their populations. The center has received grant funding from the Bill & Melinda Gates Foundation, which has funded epidemic vaccine development, and from Gavi, the Vaccine Alliance, which funds vaccination in low- and middle-income countries.