From article:
Evidence showing the benefits of large-scale deworming projects has come under scrutiny in recent weeks - the debate has even been dubbed "worm wars". Parasites, such as roundworm, hookworm (above) and whipworm could be living inside more than 1.5 billion people according to the World Health Organization (WHO).Treatment is cheap though - most experts estimate it costs just a few pence to treat someone for a year. This has contributed to the idea that in areas where parasitic worms are common, children should be routinely treated en masse, regardless of whether they are showing any signs of infection - an approach supported by the WHO.
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