Global vaccine group Gavi has 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, it said on Wednesday.

The secretary of health and human services said that funding will be curtailed until Gavi, the Vaccine Alliance, takes into account the science of vaccine safety in its campaigns.

Global vaccine group Gavi secured over $9 billion for immunizing the world's poorest children over five years, despite falling short of its $11.9 billion target. Key donors included the UK and the Gates Foundation,