What is this disease?

This disease  characterized by itchy red blisters that appear all over the body. A virus causes this condition. It often affects children, and was so common it was considered a childhood rite of passage. The infection will have to be in your body for around seven to 21 days before the rash and other symptoms develop. You start to be contagious to those around you up to 48 hours before the skin rash starts to occur.  The bumps on your body will not all be in the same phase at the same time. New bumps will continuously appear throughout your infection. The rash may be very itchy.