Wikipedia:VideoWiki/Measles

Definition
Measles is a highly contagious infectious disease, caused by the measles virus. It is also known as rubeola.



vs Rubella and Roseola
not to be confused with Rubella, (German measles) and roseola, which are different diseases, caused by unrelated viruses.



Onset of illness
Symptoms usually develop 10–12 days after exposure to an infected person, and last 7–10 days.



Initial symptoms
Initial symptoms typically include, fever, often greater than 40 C, cough, runny nose, and inflamed eyes.



Koplik's spots
Small white spots, known as Koplik's spots, may form inside the mouth, two or three days after the start of symptoms.



Rash
But the classic sign is a red (flat)  rash, which usually starts on the face three to five days after the start of symptoms, and then spreads to the rest of the body.



Common complications
About 7% of cases have complications, including diarrhea, middle ear infection, and pneumonia.



Less likely complications
Less commonly, seizures, blindness, or inflammation of the brain, may occur.



Cause
Measles is an airborne disease, which spreads very easily, through the coughs and sneezes of infected people.



Other ways to spread disease
It may also be spread through contact with saliva, or nasal secretions.



Contagiousness
It is so contagious that a single infected person will spread it to nine out of ten non-immune people who live with them.



Duration of contagiousness
One reason is that it can be spread four days before a rash develops, and continue for four days after the start of the rash.



Immunity
Fortunately, most people do not get the disease more than once.



Diagnosis
Testing for the measles virus in suspected cases is important, for public health efforts.



Prevention
The measles vaccine is effective at preventing the disease, and is often delivered in combination with other vaccines.



Vaccine effectiveness
Vaccination resulted in a 75% decrease in deaths from measles between 2000, and 2013, with about 85% of children worldwide being currently vaccinated.



Treatment
Once a person has become infected, no specific treatment is available, but supportive care may improve outcomes.



Supportive care
This may include oral rehydration solution (slightly sweet and salty fluids), healthy food, and medications to control the fever.



Antibiotics
Antibiotics may be used, if a secondary bacterial infection such as bacterial pneumonia occurs.



Vitamin A
Vitamin A supplementation is also recommended in the developing world.



Epidemiology
Measles affects about 20 million people of all ages per year, primarily in the developing areas of Africa, and Asia.



Preventable deaths
It is one of the leading vaccine-preventable disease causes of death.



Decrease in deaths
In 1980, 2.6 million people died of it, but by 2014, global vaccination programs had reduced the number of deaths to 73,000.



Increase in 2017
Rates of disease and deaths, however, increased in 2017 due to a decrease in immunization, and may be as high as 10% in people with malnutrition.



Greatest risk
Most of those who die from the infection are less than five years old. The overall risk of death among those infected is about 0.2%.