How rare is a serious traumatic brain injury?
As a rough estimate, there are “probably at least a million head injuries per year in the United States. Probably 80% or more are mild sort of dings you might get playing football or something of that nature, or a slight fall,” says Grafman, who has studied brain injuries for nearly 30 years. “The overwhelming majority of those people who have that kind of very mild head injury are going to recover nicely, either very quickly or certainly with six to nine months,” Grafman says.
