The release is expected to take place in three African countries: Ghana, Kenya and Malawi. But the Bill and Melinda Gates Foundation, a vaccine supporter, has said it has concerns. But the Gates Foundation told The Associated Press this week that it will no longer financially support the vaccine. Some scientists warn the decision could leave millions of African children at risk. It could also weaken future efforts to solve difficult problems in public health. The vaccine is called Mosquirix and is sold by GlaxoSmithKline (GSK).