Why do people so often think this? "Universal donor" means O-negative, Peter. You can't put rhesus +ve blood into someone who's rhesus-negative: they would have a (sometimes fatal) transfusion-reaction through rhesus incompatibility. Sorry to disillusion you, but don't be going through life thinking that your blood can safely be put into anyone, because I'm afraid it isn't so! This page from Wiki explains it in a little more detail.
It just isn't. A high-school biology student knows this. Sorry, but you've got it wrong. Have a look at the Wiki link I've provided above - it explains it in very simple terms, honestly. Rhesus positive cannot be "universal donor" because Rh +ve blood causes a transfusion incompatibility reaction in Rh -ve people. There's nothing particularly difficult or complicated about it, really.
are you kidding me ?? I'm O -ve, and thats the universal donor.. Now the +ve people have this protein complex called rhesus (RH) in their blood. -Ve people dont. So, if you give it to someone who doesnt have it, you might end up killin him !
mine is O positive , may be people living in certain regions have similar genetic constituents and also their blood groups are similar... no big deal
This appears to be so. In some countries, such as the UK, the two commonest groups (O+ and A+) have almost equal incidence, while in others like China and Iceland, O+ is far more common (in some countries nearly twice as common). And in most countries, around 4% of people are AB+, but in Korea it's about 12%.
Certainly not. These are still minority blood groups, even in Asia. But in some countries in South-East Asia, their incidence is three times what it is in Western European countries.