A comparison of the Oxford/AstraZeneca [ChAdOx1] (AZ) and the Johnson & Johnson [Ad26.CoV2.S] COVID-19 vaccines [159] showed that the AZ vaccination increased several inflammatory and platelet activation markers more strongly than the mRNA vaccination, with the former preferentially increasing TNF-α, IL-1β and IL-8 and the latter vaccination increasing IL-6. This evidence concerns the gene CXCL8 and COVID-19.