Is Everyone a Secretor?

Around 80% of people are secretors. For the other 20% who are non-secretors, their FUT2 gene has been interrupted by a mutation, so they can't make the free-floating form of antigens. So if you're a secretor, there are cells in your mouth that release your blood-type antigens into saliva.

How do I know if I am a secretor or non secretor?

In simple terms, a person is said to be a secretor if he or she secretes their blood type antigens into their body fluids like the saliva, the mucus, whereas on the other hand, a Non-secretor does not put or if so at all very little of their blood type antigens into these fluids [5].

Is it rare to be a secretor?

Approximately 80% of Caucasian people are secretors, while 20% are non-secretors. Non-secretors have reduced susceptibility to the most common strains of norovirus.