What is chickenpox?
Chickenpox, or varicella, is an infectious disease caused by the varicella zoster virus. It’s a highly contagious, self-limited viral infection characterized by a generalized vesicular rash. This rash will then form fluid-filled blisters that will later become scabs and fall off. Erythematous macules (red spots), papules (solid bumps), vesicles, and scabbed lesions can also occur.