Worms can get through the intestinal wall and move around under skin tissues . Guinea worm disease rates worldwide have dropped by 48 % in a year . The World Health Organization set a target for reduction in 2015 . Only smallpox has been reported worldwide since then .
Guinea worm disease rates worldwide have dropped by 48 % in a year . The World Health Organization set a target for reduction in 2015 . Only smallpox has been reported worldwide since then .