Mercer County. Traditional American values gone, Rick Santorum says at Princeton U. Traditional American values gone, Rick Santorum says at Princeton U. Traditional American values gone, Rick Santorum says at Princeton U.
Gilderoy Lockhart: Defence Against the Dark Arts: The Defence Against the Dark Arts teacher in Harry Potter and the Chamber of Secrets (Harry's second year at Hogwarts).
I'd assume healing is highly advanced magic that the average Hogwarts student would struggle at, even at NEWT levels. Given Lockharts attempt at healing Harry but ends up exacerbating matters, as well as Pomfrey's reaction, would suggest that healing is a specialized skill that requires extensve training.