A study by Castruita et al., has found through a testing of blood samples of patients who were vaccinated with the mRNA vaccines, that there was a presence of vaccine mRNA in the blood. The study differentiated between vaccine mRNA and viral RNA of SARS-CoV-2. Of the 108 patient samples, 10 samples (9.3%) had partial or up to full sequences of the vaccine mRNA sequence, which lasted for 28 days after the vaccination. This might lead a sceptic to question the safety of the blood supply. However, only 9.3 percent of patients in the sample had the mRNA in the blood. Further, the situation is probably not much different from present contact with the Covid-19 virus from people. Finally, blood transfusions are always needed, often to prevent death, so rejecting a blood transfusion merely because of fears of contamination is not rational.
