well people have died from bites from them but generally they are not fatal however they will ruin you week depending on how severe the bite is, in simple terms it will make you very ill and in alot of pain.
The Copperhead is the most common venomous snake found in the eastern US. It is also known by the name "Highland Moccasin." As a species, it belongs to the genus "Agkistrodon" which also includes the Cottonmouth, also known as the "Water Moccasin".
Copperheads are venomous, pit vipers. Copperheads account for more cases of venomous snake bite than any of our other species. Fortunately, their venom is the least toxic of our species. Bites from Copperheads are very seldom fatal; however, a bite may still produce serious consequences.