It has an incubation period of approximately 10–12 days, and clinical disease begins with symptoms of fever, conjunctivitis ... nonpruritic macular rash, predominantly on the neck and trunk.

However, fever in the presence of irritability, hypotension, a septic appearance, and a petechial or macular rash may point to meningococcemia, a medical emergency. Allergic Reaction. Swelling of ...

Measles is making a troubling comeback in the U.S., driven by declining vaccination rates and rising vaccine hesitancy.