Answer:
Until I am measured I am not known, Yet how you miss me when I have flown.
What letter comes next: O T T F F S S ?
What goes in, but never through? I've got some and so do you. We might lend one, or even two, but only if our trust is true.
I'm a bacteria that causes typhoid What's my name ?
What has a bell but isn't a church. Is full of air but is not a balloon?
Who makes it, has no need of it. Who buys it, has no use for it. Who uses it, can't see it. What is it?