CHICAGO (AP) — With frustration mounting over lawmakers' inaction on gun control, the American Medical Association on Tuesday pressed for a ban on assault weapons and came out against arming teachers as a way to fight what it calls a public health crisis.

At its annual policymaking meeting, the nation's largest physicians group bowed to unprecedented demands from doctor-members to take a stronger stand on gun violence — a problem the organizations says is as menacing as a lethal infectious disease.

The action comes against a backdrop of recurrent school shootings, everyday street violence in t...