mRNA is for the white blood cells that attack infections. So are you safe with a red blood cell transfusion? Here's a discussion on mRNA and RBC (red blood cells) prior to China Virus https://www.researchgate.net/post/Does_mRNA_translation_occur_in_red_blood_cell The question was does mRNA exist in RBC? One answer was : "Basically red blood cells lack an nucleus and most organelles to have more space for hemoglobine to increase oxygen transportation capacity. Essential mRNAs will be still present in the cytoplasma where it is translated but they will be exhausted over time. This is also the reason for the 100 days lifespan of red blood cells. " How does a blood transfusion change your body and DNA (article) https://www.medicaldaily.com/how-does-blood-transfusion-change-your-body-and-dna-404941 "...studies have shown that highly sensitive equipment can pick up donor DNA from blood transfusions up to a week after the procedure, but with particularly large transfusions, donor white blood cells were present for up to a year and a half afterward. "