Another solution; from "Scientists Find a Surprising Way to Transform A and B Blood Types Into Universal Blood" (2024) https://singularityhub.com/2024/04/29/sci

Another solution; from "Scientists Find a Surprising Way to Transform A and B Blood Types Into Universal Blood" (2024) https://singularityhub.com/2024/04/29/scientists-find-a-surprising-way-to-convert-a-and-b-blood-types-to-universal-blood/ https://singularityhub.com/2024/04/29/scientists-find-a-surp... : > Let’s Talk ABO+: When tested in clinical trials, converted blood has raised safety concerns. Even when removing A or B antigens completely from donated blood, small hints from earlier studies found an immune mismatch between the transformed donor blood and the recipient. In other words, the engineered O blood sometimes still triggered an immune response.