NOVA - Season 5 - Eps 3: Blueprints in the Bloodstream
It has been known since the turn of the century that there are four human blood groups, based on different red cells and serum characteristics. NOVA looks at the more recent discovery that the different white cell types, as determined by a variety of different molecular markers on the cell surface, open up the possibility of the prevention of disease.
About NOVA

Title: NOVA
First Air Date: 1974-03-03
Last Air Date: 2025-02-26
Status: Returning Series
Rating: 6.91/10 (from 122 votes)
Language: EN
Seasons: 53
Total Episodes: 1003
Network: PBS
Genres: Documentary
Production Companies: GBH
Synopsis
PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and technology, and highlights the people involved in scientific pursuits.