Medical science monitor : international medical journal of experimental and clinical research
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The Oxford-AstraZeneca vaccine, ChAdOx1 nCoV-19 (AZD1222), uses double-stranded DNA, while the Pfizer-BioNTech and Moderna vaccines include single-stranded RNA to encode the SARS-CoV-2 spike protein. Reference:Parums DV. Editorial: SARS-CoV-2 mRNA Vaccines and the Possible Mechanism of Vaccine-Induced Immune Thrombotic Thrombocytopenia (VITT). Med Sci Monit 2021; 27:e932899; 10.12659/MSM.932899.