“The paper device was printed with a hydrophobic reagent (compounds that repel water) except for the areas marked with the blood type letters. The team then introduced antibodies into each letter, for example, antibody A into letter A, antibody B into letter B.
A blood sample was then added into all the letters, mixed with corresponding antibodies and rinsed with a saline solution. If the red blood cells in letter A react with antibody A, they will clump together forming a large lump that will not rinse clear, leaving a clearly visible letter A.
Professor Shen said such low-cost and easy to understand sensors could be used in disease screening, medical emergencies and disaster response.”
No word on if it can detect mudblood.
(via Monash University)