I want to know what is the difference between chicken pox and smallpox?

Different virus: Smallpox has been listed as erradicated by the who as of 1978.Case fatality rate ran about 30% compaired to <.001% with chickenpox. Blisters were often dime sized and seen on the face early before covering the body. Chickenpox blisters are seen early on the neck & behind the ear and seldom bigger than a pea.

Smallpox/ chickenpox: All naturally occurring smallpox has been eradicated. Incubation is 7 to 17 days for smallpox & 10 to 21 days for chickenpox. With smallpox most lesions are in the same stage of development, are more frequent on face& extremities than trunk & are often on soles & palms. With Chickenpox most lesions are on trunk & not on feet/palms. New lesions come up in succession – so they are in different stage