I don't quite know why I'm posting this here... or at all.
But in the past 2 years, I've had 1 acquaintance die of a drugs overdose, another friend has died last month of liver disease (alcoholic), another friend has died of cancer - quite quick and sudden though she was ill on and off for years. Another close friend has had a breast cancer scare but being treated for it. The liver disease man was telling his best friend who lives abroad that he knew he was going to die. 
All the above are late 40s/early 50s.
Is this the age when this all happens?
I suppose for me, it does make you think about your mortality and it's really affected me. Doesn't help that my own dad died at 50 of a sudden heart attack, had an enlarged heart but wasn't with a doctor and had been recently divorced.