The Brief: The syringe emoji π is typically used to represent blood donation or a vaccine.
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Current renditions of the syringe emoji π show it full of red liquid that represents blood. As the COVID-19 vaccine begins to be administered worldwide, people are using π more often to represent vaccines rather than blood drawing.
Previously, Google and Facebook’s syringe emoji had a green liquid inside and Samsung’s featured a clear liquid or empty syringe. At the time of writing, Twitter’s emoji includes a clear syringe and both Apple and Google have plans to update theirs to be clear to better represent the COVID-19 vaccine.
The syringe can also represent drugs that are injected including legal pharmaceuticals and illegal ones like heroin.