O button (blood type) emoji meaning

The O button blood type emoji shows a red button with a bold capital letter O in the center. It represents the O blood type, which is important because it is a universal donor in blood transfusions. This means that people with O blood can donate to almost anyone, making it very valuable in medical situations. This emoji is often used in conversations about health, blood donations, or even when talking about someone’s specific blood type in an informal way. It helps bring attention to the importance of donating blood and spreads awareness about different blood types.

The O button (blood type) emoji was approved in Unicode 6.0 and added in Emoji 1.0, see related proposal L2/09026