You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is Definition of measles elimination - and explain in detail?
WHO defines elimination of measles as the absence of endemic measles for a period of > 12 months in the presence of adequate surveillance.
One indicator of measles elimination is a sustained measles incidence < 1/100, 000 population.
In 2005, the World Health Assembly set a goal of achieving a 90% reduction in global measles mortality by 2010 as compared with level in 2000.