Why are tonsils not removed as frequent anymore?

Answer 1

Tonsils are lymphatic tissue - when working properly, they help combat infection. With several antibiotics that can successfully treat tonsillitis today, most doctors prefer to "heal" the tonsils and leave them in, rather than remove them, if possible. Tonsillectomies are still performed, but only on occasion, where as in the 1940s and 50's, they were routine.

Answer 2

Because there are more advanced non-surgical treatments, than there were before. Removing the tonsils should be more of a last resort option, because of the importance they have in preventing illness.

Answer 3

it was realized that this tissue is beneficial to the development of immunity. For instance, children without tonsils and adenoids produce only half the immunity to oral polio vaccine