In Reply to: o neg blood posted by mazjjj on Wednesday, 1. December 2010 at 07:06 Bali Time:
Less than 0.5% of Balinese people have O negative blood as opposed to about 25% of westerners, hence the need for donations from tourists.
In general, people with type O Rh- are referred to as universal donors, as their blood can be transfused to anyone in need. It is thus the most highly sought after blood type in blood banks and hospitals.
Cheers