@ Vidqun, who said
If you have been to these bakward places, like Africa, you will know the standards are not very high.
But what if you live in most of the rest of the world, USA, Canada, Mexico, Japan, most of Europe, the Nordic countries, etc, where medical practices are much higher, what then? Should you still reject blood because Africa has problems?
As far as I know, studies did prove that those people that were not transfused (e.g. JWs) recover quicker from major operations and that they have less infections.
Why would you make a medical point by starting with "As far as I know?" It suggests you don't have concrete evidence to make the point.
You remind me of Mankkeli.