I, too, am terribly sorry about your beloved brother, and that you have no way of visiting him. It is clearly very hard for you. Nothing I say will make any difference to the situation but I just wanted you to know that someone is thinking of you and trying to ease your pain a little.
I have no idea why some younger people, with no warning, are taken. (My grandmother died suddenly at 59). Especially when it happens to younger people. You will, no doubt, be told the cause of the sudden collapse, which might make things clearer. It may be a medical issue which was not apparent before, and one that your younger brother can now take steps to avoid. For example, if it turns out to be caused by an embolism, (which sounds a possibility to me), your brother’s doctor may put him on blood thinners such as Warfarin so that he doesn’t suffer the same fate.
Please try to ensure you look after yourself though, no matter how bad you feel. Try to eat, even if it’s only soup or a slice of bread. Even if you don’t think you’ll sleep, at least get some rest, either in bed or the chair. Remember your younger brother will need support when he comes back from the hospital and you need to support each other through the next hours/days until nature takes its course.
Please believe that you are not alone. Someone here on Gransnet is bound to be posting through the night so you’ll have some company if you want to talk some more later. In the meantime, I am sending you a huge virtual hug.