Not to belittle the significance of these accidents, but it's hard to measure just how safe (or unsafe) flying in these EMS helicopters are, unless you look at the data across the board, analyzing the total # of flights vs. the accidents/injuries/fatalities. For example, when talking about the safety of flying by aircraft...
"Air travel, despite the rash of safety incidents surrounding Qantas, has never been safer.
By any measure, travellers are far safer in the air than driving to the airport, according to Boeing and the US National Safety Council.
Every day, six million people are in the air and they're 22 times safer than being on the road, the council says.
In fact, in a typical six-month period in the US, 21,000 die on the roads, which equates to the total loss of life in commercial airline accidents since 1960.
Since 1960, air safety has soared from 45 fatal accidents per million departures to less than one today as the industry learns from accidents, engines become more reliable and cockpit technology enters the computer age."
I'd be very interested in seeing such "risk adjusted" data for these EMS helicopters, based on the total number of flights nationwide vs. those w/ accidents/injuries/fatalities.