SHARP KNIVES ARE SAFER!

It's always interesting to note how what we believe is often the exact opposite of what is in fact true. Traditional logic tells us sharp knives are dangerous. More dangerous then blunt knives, and more likely to cause injury. 

But nothing could be further from the truth!

SHARPER KNIVES ARE ACTUALLY SAFER

In Regular Use

Using a dull knife will cause you to use greater force, which increases your chance of several kinds of injury: cuts, amputations, stabbing wounds into your leg, arm, or body, and increasing joint and nerve pain from repetitive motions that can be a warning sign of permanent crippling injury. Some people ultimately lose the ability to use their hands, arms, or back!
(Occupational Safety and Health Administration)

BLUNT KNIVES OVER TIME - THE EFFECTS

There is a strong possibility that you could experience increased joint and nerve pain that indicates the beginning of a permanent, crippling injury. Continuing to ignore pain or treating it only with ice, pills, and shots – rather than fixing the root problem – can lead to the inability to use your hands, arms, or back. Using dull knives also makes your work much more difficult, slower, and inefficient.
(Occupational Safety and Health Administration)

In some industries, for example the Meat and Poultry industry, blunt knives are considered so dangerous, there are actually laws requiring employers to provide sharp knives, sharpening facilities and training on how to sharpen.

Be Safe! Stay sharp. 
You can read more here.