Scientific papers describing this mRNA technology, discovered by Hungarian scientist Katalin Karik (who oversees mRNA work for BioNTech) were first published in 2005. My son is very active and had never had any clots before. UPDATED PRIMARY SERIES But when a person is diagnosed with an acute deep vein thrombosis (DVT) or pulmonary embolism (PE), Do I still need to wear a mask after vaccination? At the time, more than 8 million doses had been administreted (15/8,000,000 is a rate of .0001875% - that is less than a 2 ten-thousandths risk). The mRNA in Comirnaty is only present in the body for a short time and is not incorporated into - nor does it alter - an individuals genetic material. [CDATA[// >