Comment Re:sockatume has problems understanding (Score 1) 668
Because I strongly suspect there is a tendency to increasing over-diagnosis as outbreak size grows. Most doctors will have seen few if any cases of measles, so if someone presents with a measles-like rash during an outbreak, then it is more likely to be diagnosed as measles than when there is no outbreak. I also know of one case where a child with a rash was taken to the doctor, who said, no, definitely not measles ... then noticed on the records that the child had not been noticed, and instantly changed the diagnosis (and declined to take a sample to test). As it turned out, it was not measles. I'd not argue with over-reporting being uncontroversial in general, but I question whether it is independent of outbreak size.