Deworming programs for soil-transmitted helminths

Should global government and philanthropic aid be invested in large public health deworming programs in low- and middle-income countries? Doctors know intestinal helminths can be unpleasant, but should we be on a mission to 'deworm the world'? Will this really help people living in these poor areas, in terms of weight gain, increases in blood haemoglobin, and better attendance and performance at school?