Nigeria: UN postpones polio immunisation

United Nations health agencies have postponed plans to immunize children at the centre of the world's fastest growing polio outbreak, after a fourth Nigerian state announced a boycott over doubts about the vaccine's safety. The World Health Organisation and the UN Children's Fund had hoped Nigeria would release the results of new tests on the vaccine to disprove allegations by Islamic leaders that the immunization campaign is part of a U.S. plot to spread AIDS and make African girls infertile.