There are other diseases like this, which are rare in the USA so physicians are out-of-practice diagnosing them or have never seen them. For example, there are videos on YouTube showing examples of pertussis (whooping cough) because until antivaxxers dug in, it was extremely rare. /1

The same goes for measles (which was declared eradicated in the USA but is surging back thanks to the same insane people) and now poliomyelitis. Unfortunately modern medical treatment is ofttimes a victim of its own success. /2