Have you ever heard of a blood donor? Of course, sadly, most people reading what I just wrote, will say to themselves, "what is this... of course everyone has heard of a blood donor!". But, really, how do you know? In certain places of the world, a blood donor might not at all exist. Actually, if you can say that - and you feel superior, about it, and that you know all that needs to be known about blood donors - can you say that, with the same certainty about your knowledge, regarding what a universal blood donor is? I do not think you can. Therefore, and for other reasons, in this article you are going to be educated as to what a universal blood donor - and whatever things could be worth knowing about what it is and what differentiates them; and what makes them so much needed; if they are. I want to thank you for taking the time to read the article, and really hope you will find value in doing so.

First of all, do you know there are blood types? If you do, do you know them? If not, they are A, B, AB and O. in other words, there are four types. Some of these are rare, and some are not - but that isn't the topic of this article; so I will leave that subject right now. What you need to know, however, to understand why the existence of a universal blood donor is so very much needed, is the following: there is a so called RH factor. Either you are negative, or positive - RH. If you have a negative RH, and get blood that has a negative factor, that is bad news for you. ...So, of course, to make things easier - and, if nothing else, to make finding blood easier - of course, if there were was a universal blood donor, meaning one which could be used for people with both negative and positive factors.

Actually, there is no type of blood that can be used to give to anyone. But the O type - of the negative type - is the one that is most suitable; even though, also, that it can include stuff that will make things bad for you. What is crucial, in order to check if the blood meant to be used, is do testing - regarding the factor, and the blood type.

I hope that his universal blood donor guide has given you information you wanted. I hope that you now know more about universal blood donor, and that you enjoyed your read.