"To our knowledge, our study is the first to detect Pfizer-BioNTech and Moderna COVID-19 mRNA vaccine sequences in blood after vaccination, and therefore provides new knowledge regarding the timeframe in which the mRNA can be detected," the study authors write.
As the world continues to grapple with the ongoing COVID-19 pandemic, new questions have emerged about the origin of the virus and whether one of its more pathogenic variants, Delta, may have originated from Pfizer Inc.'s India operations.
"The most important finding from this study is that contrary to the accepted thought that fewer people are dying because infection rates are reduced by masks, this was not the case," wrote Dr. Fögen.