The Gates Foundation said on Tuesday it will commit $1.6 billion over the next five years to support Gavi, a public-private partnership that helps buy vaccines for the world's poorest children.

U.S. Health Secretary Robert F. Kennedy Jr. said the organization has “ignored the science" and “lost the public trust.”

The UK has confirmed its support for global vaccination by pledging £1.25bn to global vaccine group Gavi while the US will halt funding to the international organisation. A provider of free jabs for meningitis,