What are the Secrets about Blood Group and Rh Factor

Humans have possible four general blood group types: A, B, AB and O; this classification is derived according to scientists from proteins which are found on the surface of cells which are designed to fight off bacteria and viruses in the human body.

Read: 15 interesting facts of Human Body you must know

The Rh factor (Rh blood type chart) is a protein that can be present on the surface of red blood cells.

Most people have the Rh factor—they are Rh positive.
Others do not have the Rh factor—they are Rh negative.

BLOOD GROUP TYPE AND RH
Blood Type and RH	How Many People have it?
O+	40%
O-	7%
B+	34%
B-	6%
A+	8%
A-	1%
AB+	3%
AB-	1%

Conclusion from the above facts that the most needed blood type is A- and AB-

According to a Japanese institute that does research on blood types, there are certain personality traits that seem to match up with certain blood types. 
How do you rate?

TYPE O	You want to be a leader, and when you see something you want, you keep striving until you achieve your goal. You are a trend-setter, loyal, passionate, and self-confident. Your weaknesses include vanity and jealously and a tendency to be too competitive.
TYPE A	You like harmony, peace and organization. You work well with others, and are sensitive, patient and affectionate. Among your weaknesses are stubbornness and an inability to relax.
TYPE B	You're a rugged individualist, who's straightforward and likes to do things your own way. Creative and flexible, you adapt easily to any situation. But your insistence on being independent can sometimes go too far and become a weakness.
TYPE AB	Cool and controlled, you're generally well liked and always put people at ease.  You're a natural entertainer who's tactful and fair. But you're standoffish, blunt, and have difficulty making decisions.

Blood types who can give to who (Check what type of blood you can receive):

You Can Receive blood from
Type	O-	O+	B-	B+	A-	A+	AB-	AB+
AB+	Y	Y	Y	Y	Y	Y	Y	Y
AB-	Y	-	Y	-	Y	Y	-	-
A+	Y	Y	-	-	Y	Y	-	-
A-	Y	-	-	-	Y	-	-	-
B+	Y	Y	Y	Y	-	-	-	-
B-	Y	-	Y	-	-	-	-	-
O+	Y	Y	-	-	-	-	-	-
O-	Y	-	-	-	-	-	-	-