I have heard that two weeks is about the longest span of attention that can be offered to those not directly involved in a disaster or tragedy. After 14 days or so interest is lost and people have moved on.
That's human nature.
On the 15th day post earthquake, a French rescue team pulled a 17 year old teenager out of the rubble that was once her school. 3 days is considered the longest a human can survive without water. Miss Etienne survived 15 days. No one can really understand how she managed to survive trapped without food or water for so many days.
I can't begin to wrap my mind around how she managed this but I think that there is significance in the fact that she made it one day longer then the 14 day given attention span.