So I try to research about deaths of boxer inside the ring,
https://en.wikipedia.org/wiki/List_of_deaths_due_to_injuries_sustained_in_boxingAnd i guess this is what the rounds was readjusted in the 80's. Before boxers fought at 15 brutal rounds but was reduced to the standard that we are using today at 12 rounds.
The infamous fight that comes to my mind is Mancini vs Duk Koo Kim who collapsed in the ring and die. Then after several months the one that referee the fight committed suicide and so is Kim's mother. And it still haunts Mancini up to this day.
The rules have been adopted a lot too to protect the boxers.
I think in the 60's they are allowed to slug it out until one of them drops but these days, when the referee sees that the fight is already one-sided and one player cannot defend itself anymore, it will be stopped and declared TKO. I think the Standing Count rule was introduced because of the death of Kim Duk-Koo.
There is lesser death these days but unfortunately, it may still happen because of the nature of this sport.
Standing count and the 12 rounds, because of Kims dead, WBC was the first to implement it after that, the other body follow as well.
It was really a big impact on the boxing world, Mancini continue to fight after that, but there are many observers who says that he lost his killer instinct and doesn't want to go for the knockout anymore.
And for Pinoys, there are also death on that list as well. But at least in recent years, the number of deaths have been reduced thanks to 12 rounds and also referee making the right decision to stop the fight when they see that something is wrong.