Guinea worm disease cases worldwide have dropped by 48 % in 2015 . the Carter Center set a target for eradication in 1980 . Water can also be chemically treated with larvicide . Only smallpox has been eradicated worldwide since 2015 .
Guinea worm disease cases worldwide have dropped by 48 % in 2015 . the Carter Center set a target for eradication in 1980 . Only smallpox has been eradicated worldwide since 2015 .