A1 and A2 individuals cannot be differentiated.

How to Subscribe
MLS & MLT Comprehensive CE Package
Includes 179 CE courses, most popular
$109Add to cart
Pick Your Courses
Up to 8 CE hours
$55Add to cart
Individual course$25Add to cart
Need multiple seats for your university or lab? Get a quote
The page below is a sample from the LabCE course Introduction to the ABO Blood Group System. Access the complete course and earn ASCLS P.A.C.E.-approved continuing education credits by subscribing online.

Learn more about Introduction to the ABO Blood Group System (online CE course)

A1 and A2 individuals cannot be differentiated.

Select true or false