What is C blood type?

The c-antigen (little c) is part of the Rh blood group system and is found in approximately 80% of the United States population.

How do I know my blood type without testing?

Without drawing blood A person may be able to use a saliva sample to test for their blood type, as some people produce the characteristic antigens in their saliva. According to 2018 research , if a person does secrete these antigens in their saliva, a sample of dried saliva can reliably indicate their blood type.