The swine flu pandemic could kill millions and cause anarchy in the world’s poorest nations unless £900m can be raised from rich countries to pay for vaccines and antiviral medicines, says a UN report leaked to the Observer. The disclosure will provoke concerns that health officials will not be able to stem the growth of the worldwide H1N1 pandemic in developing countries. If the virus takes hold in the poorest nations, millions could die and the economies of fragile countries could be destroyed. Health ministers around the globe were sent the warning on Thursday in a report on the costs of averting a humanitarian disaster in the next few months. It comes as officials inside the World Health Organisation, the UN’s public health body, said they feared they would not be able to raise half that amount because of the global downturn. Gregory Hartl of WHO said the report required an urgent response from rich nations. ‘There needs to be recognition that the whole world is affected by this pandemic and the chain is only as strong as its weakest link. We have seen how H1N1 has taken hold in richer nations and in the southern hemisphere. […]