NPR conducted research and found that 60% of school shootings never happened. They called each school to verify.We went a good long while without hearing about school shootings. One prominent case was at the Univ. of Texas at Austin that involved Charles Whitman in 1966. I'm showing my age by saying that I remember that one as a teenager. There very well may have been a number of lesser school shootings since that time but before the recent ones that have received more publicity. However, it's difficult to go back and research stuff that hasn't been reported. We know there haven't been any Las Vegas-type massacres in those intervening years, too hard to ignore.
Side bar, post mortem examination disclosed that Charles Whitman had an undiagnosed brain tumor.
This makes sense and I tend to agree. Medical professionals nearly always see only the down-side of firearms in the form of GSW, etc. so they (mostly) may be expected to automatically be anti. Public health positions are bound to be suspect as to subjectivity.
Here's the the thing about firearms. They have a unique quality. They are inherently dangerous. There's no getting around it. They are designed to inflict harm. Offensively, defensively, putting game on the table, or whatever. Their sole purpose is to launch a projectile that will inflict injury if it scores a hit. And this is the only quality that many people see about guns. It wouldn't occur to them that there is a positive angle. Surely and purely it would never occur to them that firearms in the hands of citizens were intended by the Founding Fathers as a safeguard against potential internal tyranny. If it did occur to them, many liberals would never agree that using firearms to protect our personal freedoms is worth the loss of a human life.
As to the dangerous nature of firearms, as gun owners we must never let our guard down as to safety. The inherent danger of firearms never goes away. Even absent the launch of a projectile, it can be dangerous. Hand loading presents any number of dangers. Sometimes a gun blows up in a hand loader's face before the bullet even leaves the barrel. And please, always, always open the action and always look in the chamber of a firearm when you first pick it up. When handed a firearm, first thing look to see if it's loaded. The Henry BBS rifle that I bought recently had a tag on it with four places that had been signed off for chamber checking so you know that even in the factory, screw-ups have occurred.