What are the symptoms of chicken pox vs small pox?

Chickenpox symptoms include an itchy rash that progresses from red spots to fluid-filled blisters, fever, fatigue, and loss of appetite. The rash typically appears in waves and is more concentrated on the trunk and face. In contrast, smallpox presents with fever, body aches, and a more severe rash that develops into fluid-filled lesions, often starting on the face and extremities before spreading. Smallpox lesions are more uniform in appearance and are typically deeper and more severe than those of chickenpox.