Well I just read the other day that the most dangerous thing in life you can do is walk down the stairs. And particularly it is the bottom step that is the culprit, because you are either thinking there is one more or one less. BAM....head on radiator, and in a few days Mr. Whiskers is eyeing you. Step ladders/standing on something, not far behind.
Cutting bagels is unbelievable high on the list - you are supposed to lay it flat on the kitchen surface to slice through it....but who does that?
Cars. We make these things that weigh 2000 lbs, and the system we have designed to allow them to buzz about at 80 miles/hour is a slippery, narrow band. We point them straight at each other and the only thing keeping them apart is a little painted-on yellow line. Most of the time the line is optional. You can just pop over to the other side whenever you feel like it. That is insanity.
The flu. I have been reading up on the flu lately because I was on the bus the other day and this young man stumbles down the isle looking like the wrath of God and sits right behind me. He has a halo of mentholated aroma around him, like an unkind aura, and that little regular flemmish cough that means he is in the fevery communicable stage of the flu. When he hacks I can feel warm moisture on my neck. I moved and looked back and he was clutching his jacket around himself shivering.
So I was reading about the Spanish Flu epidemic of 1918. We should all know about this because four times as many people died from it than died from the War. More American troops were lost to the flu than in battle. In fact the reason it is known as the Spanish Flu is that all the other nations kept it out of the press so that the populace would keep their attention firmly on the war effort (Spain remained neutral and reporting was as normal, leaving people to think it was a Spanish problem). Worldwide one third of the population got it and something like 80 million people died. That's more than the plague apparently (greater total, but not nearly as high percentage).
Polio - a horrible disease - apparently is most contagious where poor water sanitation is present. The flu is airbourn and viciously transmittable - particularly as people, thinking it is a bad cold, try and power through, infecting travellers and office mates and such with abandon. With just a slight mutation (flu strands swap genetic packages readily), it can go from a nasty inconvenience to something far more deadly.