Maculopapular rash on the abdomen after 3 days of<unk>  infection Symptoms typically begin 10–14 days after exposure. The classic symptoms include a four-day fever (the 4 D's) and the three C's—cough, coryza (head cold, fever, sneezing), and conjunctivitis (red eyes)—along with a maculopapular rash. Fever is common and typically lasts for about one week; the fever seen with<unk>  is often as high as . Koplik's spots seen inside the mouth are diagnostic for<unk> , but are temporary and therefore rarely seen. Koplik spots are small white spots that are commonly seen on the inside of the cheeks opposite the molars. They appear as "grains of salt on a reddish background." Recognizing these spots before a person reaches their maximum infectiousness can help reduce the spread of the disease. The characteristic<unk>  rash is classically described as a generalized red maculopapular rash that begins several days after the fever starts. It starts on the back of the ears and, after a few hours, spreads to the head and neck before spreading to cover most of the body, often causing itching. The<unk>  rash appears two to four days after the initial symptoms and lasts for up to eight days. The rash is said to "stain", changing color from red to dark brown, before disappearing. Overall,<unk>  usually resolves after about three weeks. People who have been vaccinated against<unk>  but have incomplete protective immunity may experience a form of modified<unk> . Modified<unk>  is characterized by a prolonged incubation period, milder, and less characteristic symptoms (sparse and discrete rash of short duration). File:Measles child Philippines.A Filipino baby with<unk>  File:Koplik spots,<unk>  6111 lores. Koplik's spots on the third pre-eruptive day File:Koplik spots,<unk>  2019.Koplik's spots on the day of<unk>  rash. Complications Complications of<unk>  are relatively common, ranging from mild ones such as diarrhea to serious ones such as pneumonia (either direct viral pneumonia or secondary bacterial pneumonia), laryngotracheobronchitis (croup) (either direct viral laryngotracheobronchitis or secondary bacterial bronchitis), otitis media, acute brain inflammation (and very rarely subacute sclerosing panencephalitis), and corneal ulceration (leading to corneal scarring). In addition,<unk>  can suppress the immune system for weeks to months, and this can contribute to bacterial superinfections such as otitis media and bacterial pneumonia. Two months after recovery there is a 11–73% decrease in the number of antibodies against other bacteria and viruses. The death rate in the 1920s was around 30% for<unk>  pneumonia. People who are at high risk for complications are infants and children aged less than 5 years; adults aged over 20 years; pregnant women; people with compromised immune systems, such as from leukemia, HIV infection or innate immunodeficiency; and those who are malnourished or have vitamin A deficiency. Complications are usually more severe in adults. Between 1987 and 2000, the case fatality rate across the United States was three deaths per 1,000 cases attributable to<unk> , or 0.3%. In underdeveloped nations with high rates of malnutrition and poor healthcare, fatality rates have been as high as 28%. In immunocompromised persons (e.g., people with AIDS) the fatality rate is approximately 30%. Even in previously healthy children,<unk>  can cause serious illness requiring hospitalization. One out of every 1,000<unk>  cases progresses to acute encephalitis, which often results in permanent brain damage. One to three out of every 1,000 children who become infected with<unk>  will die from respiratory and neurological complications.
Measles
Zika fever
Mumps
Roseola
Ebola
Trichinosis
Smallpox
Scabies