U.S. Health Secretary Robert F. Kennedy Jr. says the country is pulling its support from the vaccines alliance Gavi.

Gavi works to expand access to vaccines for children in some of the world’s poorest countries. Health experts say the move could have deadly consequences.

Global vaccine group Gavi will have more than $9 billion for its work over the next five years helping to immunize the world's poorest children, including money raised at a Brussels fundraising summit,