Why did this girl die? Why do people die from vaccines, while others don't? What happens a year, two years, ten years down the line?
Oh, you fool.
We don't
know why the girl died. She just died. This isn't Star Trek where someone can press a gadget to her neck and download her last 30 mins' worth of vital signs: it will take time to find out why she died.
And your neat elision into "Why do people die from vaccines..." didn't pass unnoticed. Let's make this quite clear: the connection between this vaccine and her death is pretty slim unless something emerges in the autopsy that suggests otherwise: there is certainly nothing at this point to suggest that the vaccine is to blame.
People die quite regularly. Even kids. In the education district we've had about 3 non-deliberate deaths in the last year or so. It's par for the course, and it is quite likely - probably more likely than that it is the vaccine, given the number of doses that have already been administered without sudden deaths immediately afterwards.
But, to be honest, fela, reading what else you've contributed in this latest carpet-bombing, I think I'm wasting my time trying to debate reasonably with you. I think you have a very clear agenda, and you're not really interested in talking about the issue in good faith.
Jazzz is tedious enough, I think I'll spare myself the bother of getting mixed up with someone just doing him the sincerest form of flattery.
ETA: it may even be that the authorities, given that they will have her medical history, have a pretty good idea what she died of. And, guess what,
they're keeping it from us! 
.
Because, perhaps, they are considering the feelings of those closest to the girl who died, who might not want their daughter's death turned into a rolling news channel and would prefer that the information be released once it has been confirmed and in a way which is respectful, and considering our feelings by not rushing out potentially inaccurate updates until they know exactly what has happened.