i know that answer!
for something goes wrong in the immunity system. the body overreacts to a thing which it should not.... like flowers seed or any particular thing and so ur nose may run, ur eyes sore and...
actually, body thinks something dangerous is happening and so the brain put the body in a defence position to guard itself! which it should not for nothing serious is going on and the body is mistaking!
my teacher would always give this example. its like killing a tiny fly with a huge gun! u're gonna kill the fly but u're gonna detroy the whole house down!
got it?
why many evil people are so rich like bin ladan?
why do