1. Koplik spots-pathognomonic sign
2. Pre-eruptive Stage: Fever, Catarrhal Symptoms (cough, conjunctivitis, coryza), Photophobia, Stimson's line (red line on the lower conjunctiva)
3. Eruptive Stage: Maculo-papular rash, High grade fever, Anorexia and irritability, Throat is red and extremely sore
4. Convalescence Stage: Rashes fade away, Fever subsides, Desquamation begins, Symptoms subside and appetite is restored