Blood Type O 🅾️ Emoji Meaning

A symbol representing Blood Type O. Displayed as the letter O on a red background.

O Button (Blood Type) was approved as part of Unicode 6.0 in 2010 under the name “Negative Squared Latin Capital Letter O” and added to Emoji 1.0 in 2015. Copy and Paste

http://www.fastemoji.com/43904