Health data is compiled depending upon various aspects, these aspects are known as ‘public health surveillance”. The obtained information is compile, advertised and disseminated without mentioning the original source. The information is combined to created databases that will be faster and easier to retrieve by computers to tackle a broad variety of questions. The system in my opinion is not 100% accurate, but it serve its purpose. Children born with aids, during their first four years have a fifty, fifty chance to survive, once the hit the fifth year of their life they have a good chance to make it to their adulthood years. Another example is Vital statistics and reportable diseases; birth death, marriage, divorce; reporting of key transmittable
