Malaria is more serious then it seemed before

At least half a billion cases of &to=http:// english.pravda.ru/society/2001/02/06/2359.html ' target=_blank>malaria occur each year, 50 percent more than is estimated by the World Health Organisation (Who), and the disease is far more serious in south-east Asia than previously thought. So say an international team of epidemiologists, who believe the Who's malaria estimates are so disastrously wide of the mark that a global attempt to control the &to=http:// english.pravda.ru/main/2002/01/18/25858.html ' target=_blank>mosquito-borne disease by 2010 is at threat. The United Nations agency estimates more than a million people are killed by malaria each year, and at least 300 million acute cases of the disease occur annually, 90 percent of them in sub-Saharan Africa, reports Independents Online. According to ABC News, The new study suggests that in 2002, 2.2 billion people, more than a third of the world's population were potentially exposed to the malarial parasite &to=http:// english.pravda.ru/society/2003/03/06/44119.html ' target=_blank> Plasmodium falciparum . It puts the number of clinical infections at a "conservative" 515 million cases per year in a range of 300 million to 600 million. The study, published in the British weekly science journal Nature, does not attempt to give a death toll. The WHO uses a two-pronged approach for making its malaria estimates. For sub-Saharan Africa, where countries are often very poor and do not have an effective medical network for reporting cases of malaria, the agency uses "active" detection. In other words, doctors or health workers go to areas, try to establish how many people have fallen sick or died from malaria, and those figures are used, with refinements, to make an estimate for the whole country. For countries outside Africa, which are construed to have better resources, the WHO uses a "passive" approach: in essence, it uses the figures given to it by national governments. NR

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